20728155

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{113}}^1\times {\mathrm{1747}}^1$

素因数の和:1875

約数の個数: 32

約数和(自身を含む): 38260224

約数和(自身を除く): 17532069

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 113, 339, 565, 791, 1695, 1747, 2373, 3955, 5241, 8735, 11865, 12229, 26205, 36687, 61145, 183435, 197411, 592233, 987055, 1381877, 2961165, 4145631, 6909385, 20728155]

約数ペア:

[(1, 20728155), (3, 6909385), (5, 4145631), (7, 2961165), (15, 1381877), (21, 987055), (35, 592233), (105, 197411), (113, 183435), (339, 61145), (565, 36687), (791, 26205), (1695, 12229), (1747, 11865), (2373, 8735), (3955, 5241)]