21808400

素因数分解:

$2^4\times 5^2\times {\mathrm{54521}}^1$

素因数の和:54539

約数の個数: 30

約数和(自身を含む): 52395642

約数和(自身を除く): 30587242

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 54521, 109042, 218084, 272605, 436168, 545210, 872336, 1090420, 1363025, 2180840, 2726050, 4361680, 5452100, 10904200, 21808400]

約数ペア:

[(1, 21808400), (2, 10904200), (4, 5452100), (5, 4361680), (8, 2726050), (10, 2180840), (16, 1363025), (20, 1090420), (25, 872336), (40, 545210), (50, 436168), (80, 272605), (100, 218084), (200, 109042), (400, 54521)]