20523568

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{1249}}^1$

素因数の和:1349

約数の個数: 40

約数和(自身を含む): 43400000

約数和(自身を除く): 22876432

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 79, 104, 158, 208, 316, 632, 1027, 1249, 1264, 2054, 2498, 4108, 4996, 8216, 9992, 16237, 16432, 19984, 32474, 64948, 98671, 129896, 197342, 259792, 394684, 789368, 1282723, 1578736, 2565446, 5130892, 10261784, 20523568]

約数ペア:

[(1, 20523568), (2, 10261784), (4, 5130892), (8, 2565446), (13, 1578736), (16, 1282723), (26, 789368), (52, 394684), (79, 259792), (104, 197342), (158, 129896), (208, 98671), (316, 64948), (632, 32474), (1027, 19984), (1249, 16432), (1264, 16237), (2054, 9992), (2498, 8216), (4108, 4996)]