21715240

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{13241}}^1$

素因数の和:13293

約数の個数: 32

約数和(自身を含む): 50054760

約数和(自身を除く): 28339520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 13241, 26482, 52964, 66205, 105928, 132410, 264820, 529640, 542881, 1085762, 2171524, 2714405, 4343048, 5428810, 10857620, 21715240]

約数ペア:

[(1, 21715240), (2, 10857620), (4, 5428810), (5, 4343048), (8, 2714405), (10, 2171524), (20, 1085762), (40, 542881), (41, 529640), (82, 264820), (164, 132410), (205, 105928), (328, 66205), (410, 52964), (820, 26482), (1640, 13241)]