709420

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{449}}^1$

素因数の和:537

約数の個数: 24

約数和(自身を含む): 1512000

約数和(自身を除く): 802580

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 449, 790, 898, 1580, 1796, 2245, 4490, 8980, 35471, 70942, 141884, 177355, 354710, 709420]

約数ペア:

[(1, 709420), (2, 354710), (4, 177355), (5, 141884), (10, 70942), (20, 35471), (79, 8980), (158, 4490), (316, 2245), (395, 1796), (449, 1580), (790, 898)]