21030020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{5623}}^1$

素因数の和:5660

約数の個数: 48

約数和(自身を含む): 51020928

約数和(自身を除く): 29990908

約数列:

[1, 2, 4, 5, 10, 11, 17, 20, 22, 34, 44, 55, 68, 85, 110, 170, 187, 220, 340, 374, 748, 935, 1870, 3740, 5623, 11246, 22492, 28115, 56230, 61853, 95591, 112460, 123706, 191182, 247412, 309265, 382364, 477955, 618530, 955910, 1051501, 1237060, 1911820, 2103002, 4206004, 5257505, 10515010, 21030020]

約数ペア:

[(1, 21030020), (2, 10515010), (4, 5257505), (5, 4206004), (10, 2103002), (11, 1911820), (17, 1237060), (20, 1051501), (22, 955910), (34, 618530), (44, 477955), (55, 382364), (68, 309265), (85, 247412), (110, 191182), (170, 123706), (187, 112460), (220, 95591), (340, 61853), (374, 56230), (748, 28115), (935, 22492), (1870, 11246), (3740, 5623)]