20757867

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{131}}^1\times {\mathrm{239}}^1$

素因数の和:403

約数の個数: 32

約数和(自身を含む): 31933440

約数和(自身を除く): 11175573

約数列:

[1, 3, 13, 17, 39, 51, 131, 221, 239, 393, 663, 717, 1703, 2227, 3107, 4063, 5109, 6681, 9321, 12189, 28951, 31309, 52819, 86853, 93927, 158457, 407017, 532253, 1221051, 1596759, 6919289, 20757867]

約数ペア:

[(1, 20757867), (3, 6919289), (13, 1596759), (17, 1221051), (39, 532253), (51, 407017), (131, 158457), (221, 93927), (239, 86853), (393, 52819), (663, 31309), (717, 28951), (1703, 12189), (2227, 9321), (3107, 6681), (4063, 5109)]