638989825

素因数分解:

$5^2\times {\mathrm{31}}^1\times {\mathrm{431}}^1\times {\mathrm{1913}}^1$

素因数の和:2385

約数の個数: 24

約数和(自身を含む): 820233216

約数和(自身を除く): 181243391

約数列:

[1, 5, 25, 31, 155, 431, 775, 1913, 2155, 9565, 10775, 13361, 47825, 59303, 66805, 296515, 334025, 824503, 1482575, 4122515, 20612575, 25559593, 127797965, 638989825]

約数ペア:

[(1, 638989825), (5, 127797965), (25, 25559593), (31, 20612575), (155, 4122515), (431, 1482575), (775, 824503), (1913, 334025), (2155, 296515), (9565, 66805), (10775, 59303), (13361, 47825)]