21151450

素因数分解:

$2^1\times 5^2\times {\mathrm{109}}^1\times {\mathrm{3881}}^1$

素因数の和:4002

約数の個数: 24

約数和(自身を含む): 39712860

約数和(自身を除く): 18561410

約数列:

[1, 2, 5, 10, 25, 50, 109, 218, 545, 1090, 2725, 3881, 5450, 7762, 19405, 38810, 97025, 194050, 423029, 846058, 2115145, 4230290, 10575725, 21151450]

約数ペア:

[(1, 21151450), (2, 10575725), (5, 4230290), (10, 2115145), (25, 846058), (50, 423029), (109, 194050), (218, 97025), (545, 38810), (1090, 19405), (2725, 7762), (3881, 5450)]