21554020

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{12109}}^1$

素因数の和:12207

約数の個数: 24

約数和(自身を含む): 45775800

約数和(自身を除く): 24221780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 12109, 24218, 48436, 60545, 121090, 242180, 1077701, 2155402, 4310804, 5388505, 10777010, 21554020]

約数ペア:

[(1, 21554020), (2, 10777010), (4, 5388505), (5, 4310804), (10, 2155402), (20, 1077701), (89, 242180), (178, 121090), (356, 60545), (445, 48436), (890, 24218), (1780, 12109)]