20718325

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{41}}^2$

素因数の和:138

約数の個数: 36

約数和(自身を含む): 28843020

約数和(自身を除く): 8124695

約数列:

[1, 5, 17, 25, 29, 41, 85, 145, 205, 425, 493, 697, 725, 1025, 1189, 1681, 2465, 3485, 5945, 8405, 12325, 17425, 20213, 28577, 29725, 42025, 48749, 101065, 142885, 243745, 505325, 714425, 828733, 1218725, 4143665, 20718325]

約数ペア:

[(1, 20718325), (5, 4143665), (17, 1218725), (25, 828733), (29, 714425), (41, 505325), (85, 243745), (145, 142885), (205, 101065), (425, 48749), (493, 42025), (697, 29725), (725, 28577), (1025, 20213), (1189, 17425), (1681, 12325), (2465, 8405), (3485, 5945)]