81220775

素因数分解:

$5^2\times {\mathrm{31}}^1\times {\mathrm{104801}}^1$

素因数の和:104842

約数の個数: 12

約数和(自身を含む): 103963584

約数和(自身を除く): 22742809

約数列:

[1, 5, 25, 31, 155, 775, 104801, 524005, 2620025, 3248831, 16244155, 81220775]

約数ペア:

[(1, 81220775), (5, 16244155), (25, 3248831), (31, 2620025), (155, 524005), (775, 104801)]