18870297980

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{2549}}^1\times {\mathrm{4159}}^1$

素因数の和:6806

約数の個数: 48

約数和(自身を含む): 40098240000

約数和(自身を除く): 21227942020

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 2549, 4159, 5098, 8318, 10196, 12745, 16636, 20795, 25490, 41590, 50980, 83180, 226861, 370151, 453722, 740302, 907444, 1134305, 1480604, 1850755, 2268610, 3701510, 4537220, 7403020, 10601291, 21202582, 42405164, 53006455, 106012910, 212025820, 943514899, 1887029798, 3774059596, 4717574495, 9435148990, 18870297980]

約数ペア:

[(1, 18870297980), (2, 9435148990), (4, 4717574495), (5, 3774059596), (10, 1887029798), (20, 943514899), (89, 212025820), (178, 106012910), (356, 53006455), (445, 42405164), (890, 21202582), (1780, 10601291), (2549, 7403020), (4159, 4537220), (5098, 3701510), (8318, 2268610), (10196, 1850755), (12745, 1480604), (16636, 1134305), (20795, 907444), (25490, 740302), (41590, 453722), (50980, 370151), (83180, 226861)]