21340640

素因数分解:

$2^5\times 5^1\times {\mathrm{133379}}^1$

素因数の和:133394

約数の個数: 24

約数和(自身を含む): 50417640

約数和(自身を除く): 29077000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 133379, 266758, 533516, 666895, 1067032, 1333790, 2134064, 2667580, 4268128, 5335160, 10670320, 21340640]

約数ペア:

[(1, 21340640), (2, 10670320), (4, 5335160), (5, 4268128), (8, 2667580), (10, 2134064), (16, 1333790), (20, 1067032), (32, 666895), (40, 533516), (80, 266758), (160, 133379)]