77640400

素因数分解:

$2^4\times 5^2\times {\mathrm{194101}}^1$

素因数の和:194119

約数の個数: 30

約数和(自身を含む): 186532022

約数和(自身を除く): 108891622

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 194101, 388202, 776404, 970505, 1552808, 1941010, 3105616, 3882020, 4852525, 7764040, 9705050, 15528080, 19410100, 38820200, 77640400]

約数ペア:

[(1, 77640400), (2, 38820200), (4, 19410100), (5, 15528080), (8, 9705050), (10, 7764040), (16, 4852525), (20, 3882020), (25, 3105616), (40, 1941010), (50, 1552808), (80, 970505), (100, 776404), (200, 388202), (400, 194101)]