20881808

素因数分解:

$2^4\times {\mathrm{103}}^1\times {\mathrm{12671}}^1$

素因数の和:12782

約数の個数: 20

約数和(自身を含む): 40854528

約数和(自身を除く): 19972720

約数列:

[1, 2, 4, 8, 16, 103, 206, 412, 824, 1648, 12671, 25342, 50684, 101368, 202736, 1305113, 2610226, 5220452, 10440904, 20881808]

約数ペア:

[(1, 20881808), (2, 10440904), (4, 5220452), (8, 2610226), (16, 1305113), (103, 202736), (206, 101368), (412, 50684), (824, 25342), (1648, 12671)]