21608275

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{3911}}^1$

素因数の和:3951

約数の個数: 24

約数和(自身を含む): 30560544

約数和(自身を除く): 8952269

約数列:

[1, 5, 13, 17, 25, 65, 85, 221, 325, 425, 1105, 3911, 5525, 19555, 50843, 66487, 97775, 254215, 332435, 864331, 1271075, 1662175, 4321655, 21608275]

約数ペア:

[(1, 21608275), (5, 4321655), (13, 1662175), (17, 1271075), (25, 864331), (65, 332435), (85, 254215), (221, 97775), (325, 66487), (425, 50843), (1105, 19555), (3911, 5525)]