261640325

素因数分解:

$5^2\times {\mathrm{71}}^1\times {\mathrm{223}}^1\times {\mathrm{661}}^1$

素因数の和:965

約数の個数: 24

約数和(自身を含む): 330978816

約数和(自身を除く): 69338491

約数列:

[1, 5, 25, 71, 223, 355, 661, 1115, 1775, 3305, 5575, 15833, 16525, 46931, 79165, 147403, 234655, 395825, 737015, 1173275, 3685075, 10465613, 52328065, 261640325]

約数ペア:

[(1, 261640325), (5, 52328065), (25, 10465613), (71, 3685075), (223, 1173275), (355, 737015), (661, 395825), (1115, 234655), (1775, 147403), (3305, 79165), (5575, 46931), (15833, 16525)]