20214800

素因数分解:

$2^4\times 5^2\times {\mathrm{97}}^1\times {\mathrm{521}}^1$

素因数の和:636

約数の個数: 60

約数和(自身を含む): 49160916

約数和(自身を除く): 28946116

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 97, 100, 194, 200, 388, 400, 485, 521, 776, 970, 1042, 1552, 1940, 2084, 2425, 2605, 3880, 4168, 4850, 5210, 7760, 8336, 9700, 10420, 13025, 19400, 20840, 26050, 38800, 41680, 50537, 52100, 101074, 104200, 202148, 208400, 252685, 404296, 505370, 808592, 1010740, 1263425, 2021480, 2526850, 4042960, 5053700, 10107400, 20214800]

約数ペア:

[(1, 20214800), (2, 10107400), (4, 5053700), (5, 4042960), (8, 2526850), (10, 2021480), (16, 1263425), (20, 1010740), (25, 808592), (40, 505370), (50, 404296), (80, 252685), (97, 208400), (100, 202148), (194, 104200), (200, 101074), (388, 52100), (400, 50537), (485, 41680), (521, 38800), (776, 26050), (970, 20840), (1042, 19400), (1552, 13025), (1940, 10420), (2084, 9700), (2425, 8336), (2605, 7760), (3880, 5210), (4168, 4850)]