21560810

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{157}}^1\times {\mathrm{443}}^1$

素因数の和:638

約数の個数: 32

約数和(自身を含む): 40407552

約数和(自身を除く): 18846742

約数列:

[1, 2, 5, 10, 31, 62, 155, 157, 310, 314, 443, 785, 886, 1570, 2215, 4430, 4867, 9734, 13733, 24335, 27466, 48670, 68665, 69551, 137330, 139102, 347755, 695510, 2156081, 4312162, 10780405, 21560810]

約数ペア:

[(1, 21560810), (2, 10780405), (5, 4312162), (10, 2156081), (31, 695510), (62, 347755), (155, 139102), (157, 137330), (310, 69551), (314, 68665), (443, 48670), (785, 27466), (886, 24335), (1570, 13733), (2215, 9734), (4430, 4867)]