20904125

素因数分解:

$5^3\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{661}}^1$

素因数の和:710

約数の個数: 32

約数和(自身を含む): 29742336

約数和(自身を除く): 8838211

約数列:

[1, 5, 11, 23, 25, 55, 115, 125, 253, 275, 575, 661, 1265, 1375, 2875, 3305, 6325, 7271, 15203, 16525, 31625, 36355, 76015, 82625, 167233, 181775, 380075, 836165, 908875, 1900375, 4180825, 20904125]

約数ペア:

[(1, 20904125), (5, 4180825), (11, 1900375), (23, 908875), (25, 836165), (55, 380075), (115, 181775), (125, 167233), (253, 82625), (275, 76015), (575, 36355), (661, 31625), (1265, 16525), (1375, 15203), (2875, 7271), (3305, 6325)]