20217799

素因数分解:

$7^1\times {\mathrm{37}}^1\times {\mathrm{251}}^1\times {\mathrm{311}}^1$

素因数の和:606

約数の個数: 16

約数和(自身を含む): 23901696

約数和(自身を除く): 3683897

約数列:

[1, 7, 37, 251, 259, 311, 1757, 2177, 9287, 11507, 65009, 78061, 80549, 546427, 2888257, 20217799]

約数ペア:

[(1, 20217799), (7, 2888257), (37, 546427), (251, 80549), (259, 78061), (311, 65009), (1757, 11507), (2177, 9287)]