20991360

素因数分解:

$2^7\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^2$

素因数の和:93

約数の個数: 192

約数和(自身を含む): 74627280

約数和(自身を除く): 53635920

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 26, 29, 30, 32, 39, 40, 48, 52, 58, 60, 64, 65, 78, 80, 87, 96, 104, 116, 120, 128, 130, 145, 156, 160, 174, 192, 195, 208, 232, 240, 260, 290, 312, 320, 348, 377, 384, 390, 416, 435, 464, 480, 520, 580, 624, 640, 696, 754, 780, 832, 841, 870, 928, 960, 1040, 1131, 1160, 1248, 1392, 1508, 1560, 1664, 1682, 1740, 1856, 1885, 1920, 2080, 2262, 2320, 2496, 2523, 2784, 3016, 3120, 3364, 3480, 3712, 3770, 4160, 4205, 4524, 4640, 4992, 5046, 5568, 5655, 6032, 6240, 6728, 6960, 7540, 8320, 8410, 9048, 9280, 10092, 10933, 11136, 11310, 12064, 12480, 12615, 13456, 13920, 15080, 16820, 18096, 18560, 20184, 21866, 22620, 24128, 24960, 25230, 26912, 27840, 30160, 32799, 33640, 36192, 40368, 43732, 45240, 48256, 50460, 53824, 54665, 55680, 60320, 65598, 67280, 72384, 80736, 87464, 90480, 100920, 107648, 109330, 120640, 131196, 134560, 144768, 161472, 163995, 174928, 180960, 201840, 218660, 241280, 262392, 269120, 322944, 327990, 349856, 361920, 403680, 437320, 524784, 538240, 655980, 699712, 723840, 807360, 874640, 1049568, 1311960, 1399424, 1614720, 1749280, 2099136, 2623920, 3498560, 4198272, 5247840, 6997120, 10495680, 20991360]

約数ペア:

[(1, 20991360), (2, 10495680), (3, 6997120), (4, 5247840), (5, 4198272), (6, 3498560), (8, 2623920), (10, 2099136), (12, 1749280), (13, 1614720), (15, 1399424), (16, 1311960), (20, 1049568), (24, 874640), (26, 807360), (29, 723840), (30, 699712), (32, 655980), (39, 538240), (40, 524784), (48, 437320), (52, 403680), (58, 361920), (60, 349856), (64, 327990), (65, 322944), (78, 269120), (80, 262392), (87, 241280), (96, 218660), (104, 201840), (116, 180960), (120, 174928), (128, 163995), (130, 161472), (145, 144768), (156, 134560), (160, 131196), (174, 120640), (192, 109330), (195, 107648), (208, 100920), (232, 90480), (240, 87464), (260, 80736), (290, 72384), (312, 67280), (320, 65598), (348, 60320), (377, 55680), (384, 54665), (390, 53824), (416, 50460), (435, 48256), (464, 45240), (480, 43732), (520, 40368), (580, 36192), (624, 33640), (640, 32799), (696, 30160), (754, 27840), (780, 26912), (832, 25230), (841, 24960), (870, 24128), (928, 22620), (960, 21866), (1040, 20184), (1131, 18560), (1160, 18096), (1248, 16820), (1392, 15080), (1508, 13920), (1560, 13456), (1664, 12615), (1682, 12480), (1740, 12064), (1856, 11310), (1885, 11136), (1920, 10933), (2080, 10092), (2262, 9280), (2320, 9048), (2496, 8410), (2523, 8320), (2784, 7540), (3016, 6960), (3120, 6728), (3364, 6240), (3480, 6032), (3712, 5655), (3770, 5568), (4160, 5046), (4205, 4992), (4524, 4640)]