21918320

素因数分解:

$2^4\times 5^1\times {\mathrm{273979}}^1$

素因数の和:273992

約数の個数: 20

約数和(自身を含む): 50960280

約数和(自身を除く): 29041960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 273979, 547958, 1095916, 1369895, 2191832, 2739790, 4383664, 5479580, 10959160, 21918320]

約数ペア:

[(1, 21918320), (2, 10959160), (4, 5479580), (5, 4383664), (8, 2739790), (10, 2191832), (16, 1369895), (20, 1095916), (40, 547958), (80, 273979)]