18971405

素因数分解:

$5^1\times {\mathrm{17}}^2\times {\mathrm{19}}^1\times {\mathrm{691}}^1$

素因数の和:749

約数の個数: 24

約数和(自身を含む): 25493280

約数和(自身を除く): 6521875

約数列:

[1, 5, 17, 19, 85, 95, 289, 323, 691, 1445, 1615, 3455, 5491, 11747, 13129, 27455, 58735, 65645, 199699, 223193, 998495, 1115965, 3794281, 18971405]

約数ペア:

[(1, 18971405), (5, 3794281), (17, 1115965), (19, 998495), (85, 223193), (95, 199699), (289, 65645), (323, 58735), (691, 27455), (1445, 13129), (1615, 11747), (3455, 5491)]