19420640

素因数分解:

$2^5\times 5^1\times {\mathrm{121379}}^1$

素因数の和:121394

約数の個数: 24

約数和(自身を含む): 45881640

約数和(自身を除く): 26461000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 121379, 242758, 485516, 606895, 971032, 1213790, 1942064, 2427580, 3884128, 4855160, 9710320, 19420640]

約数ペア:

[(1, 19420640), (2, 9710320), (4, 4855160), (5, 3884128), (8, 2427580), (10, 1942064), (16, 1213790), (20, 971032), (32, 606895), (40, 485516), (80, 242758), (160, 121379)]