21159915

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{28789}}^1$

素因数の和:28811

約数の個数: 24

約数和(自身を含む): 39384720

約数和(自身を除く): 18224805

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 105, 147, 245, 735, 28789, 86367, 143945, 201523, 431835, 604569, 1007615, 1410661, 3022845, 4231983, 7053305, 21159915]

約数ペア:

[(1, 21159915), (3, 7053305), (5, 4231983), (7, 3022845), (15, 1410661), (21, 1007615), (35, 604569), (49, 431835), (105, 201523), (147, 143945), (245, 86367), (735, 28789)]