20639479

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{251}}^1\times {\mathrm{691}}^1$

素因数の和:966

約数の個数: 16

約数和(自身を含む): 25111296

約数和(自身を除く): 4471817

約数列:

[1, 7, 17, 119, 251, 691, 1757, 4267, 4837, 11747, 29869, 82229, 173441, 1214087, 2948497, 20639479]

約数ペア:

[(1, 20639479), (7, 2948497), (17, 1214087), (119, 173441), (251, 82229), (691, 29869), (1757, 11747), (4267, 4837)]