20981306

素因数分解:

$2^1\times {\mathrm{103}}^1\times {\mathrm{179}}^1\times {\mathrm{569}}^1$

素因数の和:853

約数の個数: 16

約数和(自身を含む): 32011200

約数和(自身を除く): 11029894

約数列:

[1, 2, 103, 179, 206, 358, 569, 1138, 18437, 36874, 58607, 101851, 117214, 203702, 10490653, 20981306]

約数ペア:

[(1, 20981306), (2, 10490653), (103, 203702), (179, 117214), (206, 101851), (358, 58607), (569, 36874), (1138, 18437)]