21002090

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{72421}}^1$

素因数の和:72457

約数の個数: 16

約数和(自身を含む): 39107880

約数和(自身を除く): 18105790

約数列:

[1, 2, 5, 10, 29, 58, 145, 290, 72421, 144842, 362105, 724210, 2100209, 4200418, 10501045, 21002090]

約数ペア:

[(1, 21002090), (2, 10501045), (5, 4200418), (10, 2100209), (29, 724210), (58, 362105), (145, 144842), (290, 72421)]