20912050

素因数分解:

$2^1\times 5^2\times {\mathrm{41}}^1\times {\mathrm{101}}^2$

素因数の和:255

約数の個数: 36

約数和(自身を含む): 40243518

約数和(自身を除く): 19331468

約数列:

[1, 2, 5, 10, 25, 41, 50, 82, 101, 202, 205, 410, 505, 1010, 1025, 2050, 2525, 4141, 5050, 8282, 10201, 20402, 20705, 41410, 51005, 102010, 103525, 207050, 255025, 418241, 510050, 836482, 2091205, 4182410, 10456025, 20912050]

約数ペア:

[(1, 20912050), (2, 10456025), (5, 4182410), (10, 2091205), (25, 836482), (41, 510050), (50, 418241), (82, 255025), (101, 207050), (202, 103525), (205, 102010), (410, 51005), (505, 41410), (1010, 20705), (1025, 20402), (2050, 10201), (2525, 8282), (4141, 5050)]