18664225

素因数分解:

$5^2\times {\mathrm{41}}^1\times {\mathrm{131}}^1\times {\mathrm{139}}^1$

素因数の和:321

約数の個数: 24

約数和(自身を含む): 24060960

約数和(自身を除く): 5396735

約数列:

[1, 5, 25, 41, 131, 139, 205, 655, 695, 1025, 3275, 3475, 5371, 5699, 18209, 26855, 28495, 91045, 134275, 142475, 455225, 746569, 3732845, 18664225]

約数ペア:

[(1, 18664225), (5, 3732845), (25, 746569), (41, 455225), (131, 142475), (139, 134275), (205, 91045), (655, 28495), (695, 26855), (1025, 18209), (3275, 5699), (3475, 5371)]