285980

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{181}}^1$

素因数の和:269

約数の個数: 24

約数和(自身を含む): 611520

約数和(自身を除く): 325540

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 181, 316, 362, 395, 724, 790, 905, 1580, 1810, 3620, 14299, 28598, 57196, 71495, 142990, 285980]

約数ペア:

[(1, 285980), (2, 142990), (4, 71495), (5, 57196), (10, 28598), (20, 14299), (79, 3620), (158, 1810), (181, 1580), (316, 905), (362, 790), (395, 724)]