20010928

素因数分解:

$2^4\times 7^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{101}}^1$

素因数の和:206

約数の個数: 80

約数和(自身を含む): 47050560

約数和(自身を除く): 27039632

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 29, 56, 58, 61, 101, 112, 116, 122, 202, 203, 232, 244, 404, 406, 427, 464, 488, 707, 808, 812, 854, 976, 1414, 1616, 1624, 1708, 1769, 2828, 2929, 3248, 3416, 3538, 5656, 5858, 6161, 6832, 7076, 11312, 11716, 12322, 12383, 14152, 20503, 23432, 24644, 24766, 28304, 41006, 43127, 46864, 49288, 49532, 82012, 86254, 98576, 99064, 164024, 172508, 178669, 198128, 328048, 345016, 357338, 690032, 714676, 1250683, 1429352, 2501366, 2858704, 5002732, 10005464, 20010928]

約数ペア:

[(1, 20010928), (2, 10005464), (4, 5002732), (7, 2858704), (8, 2501366), (14, 1429352), (16, 1250683), (28, 714676), (29, 690032), (56, 357338), (58, 345016), (61, 328048), (101, 198128), (112, 178669), (116, 172508), (122, 164024), (202, 99064), (203, 98576), (232, 86254), (244, 82012), (404, 49532), (406, 49288), (427, 46864), (464, 43127), (488, 41006), (707, 28304), (808, 24766), (812, 24644), (854, 23432), (976, 20503), (1414, 14152), (1616, 12383), (1624, 12322), (1708, 11716), (1769, 11312), (2828, 7076), (2929, 6832), (3248, 6161), (3416, 5858), (3538, 5656)]