21815785

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{97}}^1\times {\mathrm{1451}}^1$

素因数の和:1584

約数の個数: 16

約数和(自身を含む): 27320832

約数和(自身を除く): 5505047

約数列:

[1, 5, 31, 97, 155, 485, 1451, 3007, 7255, 15035, 44981, 140747, 224905, 703735, 4363157, 21815785]

約数ペア:

[(1, 21815785), (5, 4363157), (31, 703735), (97, 224905), (155, 140747), (485, 44981), (1451, 15035), (3007, 7255)]