20421868

素因数分解:

$2^2\times {\mathrm{67}}^1\times {\mathrm{181}}^1\times {\mathrm{421}}^1$

素因数の和:673

約数の個数: 24

約数和(自身を含む): 36558704

約数和(自身を除く): 16136836

約数列:

[1, 2, 4, 67, 134, 181, 268, 362, 421, 724, 842, 1684, 12127, 24254, 28207, 48508, 56414, 76201, 112828, 152402, 304804, 5105467, 10210934, 20421868]

約数ペア:

[(1, 20421868), (2, 10210934), (4, 5105467), (67, 304804), (134, 152402), (181, 112828), (268, 76201), (362, 56414), (421, 48508), (724, 28207), (842, 24254), (1684, 12127)]