638862025

素因数分解:

$5^2\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{9901}}^1$

素因数の和:10029

約数の個数: 24

約数和(自身を含む): 828797400

約数和(自身を除く): 189935375

約数列:

[1, 5, 25, 29, 89, 145, 445, 725, 2225, 2581, 9901, 12905, 49505, 64525, 247525, 287129, 881189, 1435645, 4405945, 7178225, 22029725, 25554481, 127772405, 638862025]

約数ペア:

[(1, 638862025), (5, 127772405), (25, 25554481), (29, 22029725), (89, 7178225), (145, 4405945), (445, 1435645), (725, 881189), (2225, 287129), (2581, 247525), (9901, 64525), (12905, 49505)]