18913605

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^2\times {\mathrm{4363}}^1$

素因数の和:4405

約数の個数: 24

約数和(自身を含む): 32153952

約数和(自身を除く): 13240347

約数列:

[1, 3, 5, 15, 17, 51, 85, 255, 289, 867, 1445, 4335, 4363, 13089, 21815, 65445, 74171, 222513, 370855, 1112565, 1260907, 3782721, 6304535, 18913605]

約数ペア:

[(1, 18913605), (3, 6304535), (5, 3782721), (15, 1260907), (17, 1112565), (51, 370855), (85, 222513), (255, 74171), (289, 65445), (867, 21815), (1445, 13089), (4335, 4363)]