20187010720

素因数分解:

$2^5\times 5^1\times {\mathrm{239}}^1\times {\mathrm{643}}^1\times {\mathrm{821}}^1$

素因数の和:1718

約数の個数: 96

約数和(自身を含む): 48024264960

約数和(自身を除く): 27837254240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 239, 478, 643, 821, 956, 1195, 1286, 1642, 1912, 2390, 2572, 3215, 3284, 3824, 4105, 4780, 5144, 6430, 6568, 7648, 8210, 9560, 10288, 12860, 13136, 16420, 19120, 20576, 25720, 26272, 32840, 38240, 51440, 65680, 102880, 131360, 153677, 196219, 307354, 392438, 527903, 614708, 768385, 784876, 981095, 1055806, 1229416, 1536770, 1569752, 1962190, 2111612, 2458832, 2639515, 3073540, 3139504, 3924380, 4223224, 4917664, 5279030, 6147080, 6279008, 7848760, 8446448, 10558060, 12294160, 15697520, 16892896, 21116120, 24588320, 31395040, 42232240, 84464480, 126168817, 252337634, 504675268, 630844085, 1009350536, 1261688170, 2018701072, 2523376340, 4037402144, 5046752680, 10093505360, 20187010720]

約数ペア:

[(1, 20187010720), (2, 10093505360), (4, 5046752680), (5, 4037402144), (8, 2523376340), (10, 2018701072), (16, 1261688170), (20, 1009350536), (32, 630844085), (40, 504675268), (80, 252337634), (160, 126168817), (239, 84464480), (478, 42232240), (643, 31395040), (821, 24588320), (956, 21116120), (1195, 16892896), (1286, 15697520), (1642, 12294160), (1912, 10558060), (2390, 8446448), (2572, 7848760), (3215, 6279008), (3284, 6147080), (3824, 5279030), (4105, 4917664), (4780, 4223224), (5144, 3924380), (6430, 3139504), (6568, 3073540), (7648, 2639515), (8210, 2458832), (9560, 2111612), (10288, 1962190), (12860, 1569752), (13136, 1536770), (16420, 1229416), (19120, 1055806), (20576, 981095), (25720, 784876), (26272, 768385), (32840, 614708), (38240, 527903), (51440, 392438), (65680, 307354), (102880, 196219), (131360, 153677)]