19821355

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{223}}^1\times {\mathrm{613}}^1$

素因数の和:870

約数の個数: 16

約数和(自身を含む): 24756480

約数和(自身を除く): 4935125

約数列:

[1, 5, 29, 145, 223, 613, 1115, 3065, 6467, 17777, 32335, 88885, 136699, 683495, 3964271, 19821355]

約数ペア:

[(1, 19821355), (5, 3964271), (29, 683495), (145, 136699), (223, 88885), (613, 32335), (1115, 17777), (3065, 6467)]