20321665

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{757}}^1$

素因数の和:841

約数の個数: 32

約数和(自身を含む): 30562560

約数和(自身を除く): 10240895

約数列:

[1, 5, 7, 13, 35, 59, 65, 91, 295, 413, 455, 757, 767, 2065, 3785, 3835, 5299, 5369, 9841, 26495, 26845, 44663, 49205, 68887, 223315, 312641, 344435, 580619, 1563205, 2903095, 4064333, 20321665]

約数ペア:

[(1, 20321665), (5, 4064333), (7, 2903095), (13, 1563205), (35, 580619), (59, 344435), (65, 312641), (91, 223315), (295, 68887), (413, 49205), (455, 44663), (757, 26845), (767, 26495), (2065, 9841), (3785, 5369), (3835, 5299)]