520400

素因数分解:

$2^4\times 5^2\times {\mathrm{1301}}^1$

素因数の和:1319

約数の個数: 30

約数和(自身を含む): 1251222

約数和(自身を除く): 730822

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 1301, 2602, 5204, 6505, 10408, 13010, 20816, 26020, 32525, 52040, 65050, 104080, 130100, 260200, 520400]

約数ペア:

[(1, 520400), (2, 260200), (4, 130100), (5, 104080), (8, 65050), (10, 52040), (16, 32525), (20, 26020), (25, 20816), (40, 13010), (50, 10408), (80, 6505), (100, 5204), (200, 2602), (400, 1301)]