21916640

素因数分解:

$2^5\times 5^1\times {\mathrm{136979}}^1$

素因数の和:136994

約数の個数: 24

約数和(自身を含む): 51778440

約数和(自身を除く): 29861800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 136979, 273958, 547916, 684895, 1095832, 1369790, 2191664, 2739580, 4383328, 5479160, 10958320, 21916640]

約数ペア:

[(1, 21916640), (2, 10958320), (4, 5479160), (5, 4383328), (8, 2739580), (10, 2191664), (16, 1369790), (20, 1095832), (32, 684895), (40, 547916), (80, 273958), (160, 136979)]