21223640

素因数分解:

$2^3\times 5^1\times {\mathrm{173}}^1\times {\mathrm{3067}}^1$

素因数の和:3251

約数の個数: 32

約数和(自身を含む): 48044880

約数和(自身を除く): 26821240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 173, 346, 692, 865, 1384, 1730, 3067, 3460, 6134, 6920, 12268, 15335, 24536, 30670, 61340, 122680, 530591, 1061182, 2122364, 2652955, 4244728, 5305910, 10611820, 21223640]

約数ペア:

[(1, 21223640), (2, 10611820), (4, 5305910), (5, 4244728), (8, 2652955), (10, 2122364), (20, 1061182), (40, 530591), (173, 122680), (346, 61340), (692, 30670), (865, 24536), (1384, 15335), (1730, 12268), (3067, 6920), (3460, 6134)]