21116140

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{11863}}^1$

素因数の和:11961

約数の個数: 24

約数和(自身を含む): 44845920

約数和(自身を除く): 23729780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 11863, 23726, 47452, 59315, 118630, 237260, 1055807, 2111614, 4223228, 5279035, 10558070, 21116140]

約数ペア:

[(1, 21116140), (2, 10558070), (4, 5279035), (5, 4223228), (10, 2111614), (20, 1055807), (89, 237260), (178, 118630), (356, 59315), (445, 47452), (890, 23726), (1780, 11863)]