20123656

素因数分解:

$2^3\times 7^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{137}}^1$

素因数の和:254

約数の個数: 64

約数和(自身を含む): 45175680

約数和(自身を除く): 25052024

約数列:

[1, 2, 4, 7, 8, 14, 28, 43, 56, 61, 86, 122, 137, 172, 244, 274, 301, 344, 427, 488, 548, 602, 854, 959, 1096, 1204, 1708, 1918, 2408, 2623, 3416, 3836, 5246, 5891, 7672, 8357, 10492, 11782, 16714, 18361, 20984, 23564, 33428, 36722, 41237, 47128, 58499, 66856, 73444, 82474, 116998, 146888, 164948, 233996, 329896, 359351, 467992, 718702, 1437404, 2515457, 2874808, 5030914, 10061828, 20123656]

約数ペア:

[(1, 20123656), (2, 10061828), (4, 5030914), (7, 2874808), (8, 2515457), (14, 1437404), (28, 718702), (43, 467992), (56, 359351), (61, 329896), (86, 233996), (122, 164948), (137, 146888), (172, 116998), (244, 82474), (274, 73444), (301, 66856), (344, 58499), (427, 47128), (488, 41237), (548, 36722), (602, 33428), (854, 23564), (959, 20984), (1096, 18361), (1204, 16714), (1708, 11782), (1918, 10492), (2408, 8357), (2623, 7672), (3416, 5891), (3836, 5246)]