21206640

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{971}}^1$

素因数の和:1007

約数の個数: 160

約数和(自身を含む): 80994816

約数和(自身を除く): 59788176

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 13, 14, 15, 16, 20, 21, 24, 26, 28, 30, 35, 39, 40, 42, 48, 52, 56, 60, 65, 70, 78, 80, 84, 91, 104, 105, 112, 120, 130, 140, 156, 168, 182, 195, 208, 210, 240, 260, 273, 280, 312, 336, 364, 390, 420, 455, 520, 546, 560, 624, 728, 780, 840, 910, 971, 1040, 1092, 1365, 1456, 1560, 1680, 1820, 1942, 2184, 2730, 2913, 3120, 3640, 3884, 4368, 4855, 5460, 5826, 6797, 7280, 7768, 9710, 10920, 11652, 12623, 13594, 14565, 15536, 19420, 20391, 21840, 23304, 25246, 27188, 29130, 33985, 37869, 38840, 40782, 46608, 50492, 54376, 58260, 63115, 67970, 75738, 77680, 81564, 88361, 100984, 101955, 108752, 116520, 126230, 135940, 151476, 163128, 176722, 189345, 201968, 203910, 233040, 252460, 265083, 271880, 302952, 326256, 353444, 378690, 407820, 441805, 504920, 530166, 543760, 605904, 706888, 757380, 815640, 883610, 1009840, 1060332, 1325415, 1413776, 1514760, 1631280, 1767220, 2120664, 2650830, 3029520, 3534440, 4241328, 5301660, 7068880, 10603320, 21206640]

約数ペア:

[(1, 21206640), (2, 10603320), (3, 7068880), (4, 5301660), (5, 4241328), (6, 3534440), (7, 3029520), (8, 2650830), (10, 2120664), (12, 1767220), (13, 1631280), (14, 1514760), (15, 1413776), (16, 1325415), (20, 1060332), (21, 1009840), (24, 883610), (26, 815640), (28, 757380), (30, 706888), (35, 605904), (39, 543760), (40, 530166), (42, 504920), (48, 441805), (52, 407820), (56, 378690), (60, 353444), (65, 326256), (70, 302952), (78, 271880), (80, 265083), (84, 252460), (91, 233040), (104, 203910), (105, 201968), (112, 189345), (120, 176722), (130, 163128), (140, 151476), (156, 135940), (168, 126230), (182, 116520), (195, 108752), (208, 101955), (210, 100984), (240, 88361), (260, 81564), (273, 77680), (280, 75738), (312, 67970), (336, 63115), (364, 58260), (390, 54376), (420, 50492), (455, 46608), (520, 40782), (546, 38840), (560, 37869), (624, 33985), (728, 29130), (780, 27188), (840, 25246), (910, 23304), (971, 21840), (1040, 20391), (1092, 19420), (1365, 15536), (1456, 14565), (1560, 13594), (1680, 12623), (1820, 11652), (1942, 10920), (2184, 9710), (2730, 7768), (2913, 7280), (3120, 6797), (3640, 5826), (3884, 5460), (4368, 4855)]