31981320

素因数分解:

$2^3\times 3^2\times 5^1\times 7^4\times {\mathrm{37}}^1$

素因数の和:82

約数の個数: 240

約数和(自身を含む): 124532460

約数和(自身を除く): 92551140

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 18, 20, 21, 24, 28, 30, 35, 36, 37, 40, 42, 45, 49, 56, 60, 63, 70, 72, 74, 84, 90, 98, 105, 111, 120, 126, 140, 147, 148, 168, 180, 185, 196, 210, 222, 245, 252, 259, 280, 294, 296, 315, 333, 343, 360, 370, 392, 420, 441, 444, 490, 504, 518, 555, 588, 630, 666, 686, 735, 740, 777, 840, 882, 888, 980, 1029, 1036, 1110, 1176, 1260, 1295, 1332, 1372, 1470, 1480, 1554, 1665, 1715, 1764, 1813, 1960, 2058, 2072, 2205, 2220, 2331, 2401, 2520, 2590, 2664, 2744, 2940, 3087, 3108, 3330, 3430, 3528, 3626, 3885, 4116, 4410, 4440, 4662, 4802, 5145, 5180, 5439, 5880, 6174, 6216, 6660, 6860, 7203, 7252, 7770, 8232, 8820, 9065, 9324, 9604, 10290, 10360, 10878, 11655, 12005, 12348, 12691, 13320, 13720, 14406, 14504, 15435, 15540, 16317, 17640, 18130, 18648, 19208, 20580, 21609, 21756, 23310, 24010, 24696, 25382, 27195, 28812, 30870, 31080, 32634, 36015, 36260, 38073, 41160, 43218, 43512, 46620, 48020, 50764, 54390, 57624, 61740, 63455, 65268, 72030, 72520, 76146, 81585, 86436, 88837, 93240, 96040, 101528, 108045, 108780, 114219, 123480, 126910, 130536, 144060, 152292, 163170, 172872, 177674, 190365, 216090, 217560, 228438, 253820, 266511, 288120, 304584, 326340, 355348, 380730, 432180, 444185, 456876, 507640, 533022, 571095, 652680, 710696, 761460, 799533, 864360, 888370, 913752, 1066044, 1142190, 1332555, 1522920, 1599066, 1776740, 2132088, 2284380, 2665110, 3198132, 3553480, 3997665, 4568760, 5330220, 6396264, 7995330, 10660440, 15990660, 31981320]

約数ペア:

[(1, 31981320), (2, 15990660), (3, 10660440), (4, 7995330), (5, 6396264), (6, 5330220), (7, 4568760), (8, 3997665), (9, 3553480), (10, 3198132), (12, 2665110), (14, 2284380), (15, 2132088), (18, 1776740), (20, 1599066), (21, 1522920), (24, 1332555), (28, 1142190), (30, 1066044), (35, 913752), (36, 888370), (37, 864360), (40, 799533), (42, 761460), (45, 710696), (49, 652680), (56, 571095), (60, 533022), (63, 507640), (70, 456876), (72, 444185), (74, 432180), (84, 380730), (90, 355348), (98, 326340), (105, 304584), (111, 288120), (120, 266511), (126, 253820), (140, 228438), (147, 217560), (148, 216090), (168, 190365), (180, 177674), (185, 172872), (196, 163170), (210, 152292), (222, 144060), (245, 130536), (252, 126910), (259, 123480), (280, 114219), (294, 108780), (296, 108045), (315, 101528), (333, 96040), (343, 93240), (360, 88837), (370, 86436), (392, 81585), (420, 76146), (441, 72520), (444, 72030), (490, 65268), (504, 63455), (518, 61740), (555, 57624), (588, 54390), (630, 50764), (666, 48020), (686, 46620), (735, 43512), (740, 43218), (777, 41160), (840, 38073), (882, 36260), (888, 36015), (980, 32634), (1029, 31080), (1036, 30870), (1110, 28812), (1176, 27195), (1260, 25382), (1295, 24696), (1332, 24010), (1372, 23310), (1470, 21756), (1480, 21609), (1554, 20580), (1665, 19208), (1715, 18648), (1764, 18130), (1813, 17640), (1960, 16317), (2058, 15540), (2072, 15435), (2205, 14504), (2220, 14406), (2331, 13720), (2401, 13320), (2520, 12691), (2590, 12348), (2664, 12005), (2744, 11655), (2940, 10878), (3087, 10360), (3108, 10290), (3330, 9604), (3430, 9324), (3528, 9065), (3626, 8820), (3885, 8232), (4116, 7770), (4410, 7252), (4440, 7203), (4662, 6860), (4802, 6660), (5145, 6216), (5180, 6174), (5439, 5880)]