20211560

素因数分解:

$2^3\times 5^1\times {\mathrm{439}}^1\times {\mathrm{1151}}^1$

素因数の和:1601

約数の個数: 32

約数和(自身を含む): 45619200

約数和(自身を除く): 25407640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 439, 878, 1151, 1756, 2195, 2302, 3512, 4390, 4604, 5755, 8780, 9208, 11510, 17560, 23020, 46040, 505289, 1010578, 2021156, 2526445, 4042312, 5052890, 10105780, 20211560]

約数ペア:

[(1, 20211560), (2, 10105780), (4, 5052890), (5, 4042312), (8, 2526445), (10, 2021156), (20, 1010578), (40, 505289), (439, 46040), (878, 23020), (1151, 17560), (1756, 11510), (2195, 9208), (2302, 8780), (3512, 5755), (4390, 4604)]