138840580

素因数分解:

$2^2\times 5^1\times {\mathrm{809}}^1\times {\mathrm{8581}}^1$

素因数の和:9399

約数の個数: 24

約数和(自身を含む): 291959640

約数和(自身を除く): 153119060

約数列:

[1, 2, 4, 5, 10, 20, 809, 1618, 3236, 4045, 8090, 8581, 16180, 17162, 34324, 42905, 85810, 171620, 6942029, 13884058, 27768116, 34710145, 69420290, 138840580]

約数ペア:

[(1, 138840580), (2, 69420290), (4, 34710145), (5, 27768116), (10, 13884058), (20, 6942029), (809, 171620), (1618, 85810), (3236, 42905), (4045, 34324), (8090, 17162), (8581, 16180)]