21405830

素因数分解:

$2^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{743}}^1$

素因数の和:860

約数の個数: 32

約数和(自身を含む): 40068864

約数和(自身を除く): 18663034

約数列:

[1, 2, 5, 10, 43, 67, 86, 134, 215, 335, 430, 670, 743, 1486, 2881, 3715, 5762, 7430, 14405, 28810, 31949, 49781, 63898, 99562, 159745, 248905, 319490, 497810, 2140583, 4281166, 10702915, 21405830]

約数ペア:

[(1, 21405830), (2, 10702915), (5, 4281166), (10, 2140583), (43, 497810), (67, 319490), (86, 248905), (134, 159745), (215, 99562), (335, 63898), (430, 49781), (670, 31949), (743, 28810), (1486, 14405), (2881, 7430), (3715, 5762)]