18163120

素因数分解:

$2^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{2551}}^1$

素因数の和:2653

約数の個数: 40

約数和(自身を含む): 42720480

約数和(自身を除く): 24557360

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 89, 178, 356, 445, 712, 890, 1424, 1780, 2551, 3560, 5102, 7120, 10204, 12755, 20408, 25510, 40816, 51020, 102040, 204080, 227039, 454078, 908156, 1135195, 1816312, 2270390, 3632624, 4540780, 9081560, 18163120]

約数ペア:

[(1, 18163120), (2, 9081560), (4, 4540780), (5, 3632624), (8, 2270390), (10, 1816312), (16, 1135195), (20, 908156), (40, 454078), (80, 227039), (89, 204080), (178, 102040), (356, 51020), (445, 40816), (712, 25510), (890, 20408), (1424, 12755), (1780, 10204), (2551, 7120), (3560, 5102)]