20450640

素因数分解:

$2^4\times 3^1\times 5^1\times 7^2\times {\mathrm{37}}^1\times {\mathrm{47}}^1$

素因数の和:114

約数の個数: 240

約数和(自身を含む): 77352192

約数和(自身を除く): 56901552

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 37, 40, 42, 47, 48, 49, 56, 60, 70, 74, 80, 84, 94, 98, 105, 111, 112, 120, 140, 141, 147, 148, 168, 185, 188, 196, 210, 222, 235, 240, 245, 259, 280, 282, 294, 296, 329, 336, 370, 376, 392, 420, 444, 470, 490, 518, 555, 560, 564, 588, 592, 658, 705, 735, 740, 752, 777, 784, 840, 888, 940, 980, 987, 1036, 1110, 1128, 1176, 1295, 1316, 1410, 1470, 1480, 1554, 1645, 1680, 1739, 1776, 1813, 1880, 1960, 1974, 2072, 2220, 2256, 2303, 2352, 2590, 2632, 2820, 2940, 2960, 3108, 3290, 3478, 3626, 3760, 3885, 3920, 3948, 4144, 4440, 4606, 4935, 5180, 5217, 5264, 5439, 5640, 5880, 6216, 6580, 6909, 6956, 7252, 7770, 7896, 8695, 8880, 9065, 9212, 9870, 10360, 10434, 10878, 11280, 11515, 11760, 12173, 12432, 13160, 13818, 13912, 14504, 15540, 15792, 17390, 18130, 18424, 19740, 20720, 20868, 21756, 23030, 24346, 26085, 26320, 27195, 27636, 27824, 29008, 31080, 34545, 34780, 36260, 36519, 36848, 39480, 41736, 43512, 46060, 48692, 52170, 54390, 55272, 60865, 62160, 69090, 69560, 72520, 73038, 78960, 83472, 85211, 87024, 92120, 97384, 104340, 108780, 110544, 121730, 138180, 139120, 145040, 146076, 170422, 182595, 184240, 194768, 208680, 217560, 243460, 255633, 276360, 292152, 340844, 365190, 417360, 426055, 435120, 486920, 511266, 552720, 584304, 681688, 730380, 852110, 973840, 1022532, 1278165, 1363376, 1460760, 1704220, 2045064, 2556330, 2921520, 3408440, 4090128, 5112660, 6816880, 10225320, 20450640]

約数ペア:

[(1, 20450640), (2, 10225320), (3, 6816880), (4, 5112660), (5, 4090128), (6, 3408440), (7, 2921520), (8, 2556330), (10, 2045064), (12, 1704220), (14, 1460760), (15, 1363376), (16, 1278165), (20, 1022532), (21, 973840), (24, 852110), (28, 730380), (30, 681688), (35, 584304), (37, 552720), (40, 511266), (42, 486920), (47, 435120), (48, 426055), (49, 417360), (56, 365190), (60, 340844), (70, 292152), (74, 276360), (80, 255633), (84, 243460), (94, 217560), (98, 208680), (105, 194768), (111, 184240), (112, 182595), (120, 170422), (140, 146076), (141, 145040), (147, 139120), (148, 138180), (168, 121730), (185, 110544), (188, 108780), (196, 104340), (210, 97384), (222, 92120), (235, 87024), (240, 85211), (245, 83472), (259, 78960), (280, 73038), (282, 72520), (294, 69560), (296, 69090), (329, 62160), (336, 60865), (370, 55272), (376, 54390), (392, 52170), (420, 48692), (444, 46060), (470, 43512), (490, 41736), (518, 39480), (555, 36848), (560, 36519), (564, 36260), (588, 34780), (592, 34545), (658, 31080), (705, 29008), (735, 27824), (740, 27636), (752, 27195), (777, 26320), (784, 26085), (840, 24346), (888, 23030), (940, 21756), (980, 20868), (987, 20720), (1036, 19740), (1110, 18424), (1128, 18130), (1176, 17390), (1295, 15792), (1316, 15540), (1410, 14504), (1470, 13912), (1480, 13818), (1554, 13160), (1645, 12432), (1680, 12173), (1739, 11760), (1776, 11515), (1813, 11280), (1880, 10878), (1960, 10434), (1974, 10360), (2072, 9870), (2220, 9212), (2256, 9065), (2303, 8880), (2352, 8695), (2590, 7896), (2632, 7770), (2820, 7252), (2940, 6956), (2960, 6909), (3108, 6580), (3290, 6216), (3478, 5880), (3626, 5640), (3760, 5439), (3885, 5264), (3920, 5217), (3948, 5180), (4144, 4935), (4440, 4606)]