20961820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{151}}^1\times {\mathrm{631}}^1$

素因数の和:802

約数の個数: 48

約数和(自身を含む): 48416256

約数和(自身を除く): 27454436

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 151, 220, 302, 604, 631, 755, 1262, 1510, 1661, 2524, 3020, 3155, 3322, 6310, 6644, 6941, 8305, 12620, 13882, 16610, 27764, 33220, 34705, 69410, 95281, 138820, 190562, 381124, 476405, 952810, 1048091, 1905620, 2096182, 4192364, 5240455, 10480910, 20961820]

約数ペア:

[(1, 20961820), (2, 10480910), (4, 5240455), (5, 4192364), (10, 2096182), (11, 1905620), (20, 1048091), (22, 952810), (44, 476405), (55, 381124), (110, 190562), (151, 138820), (220, 95281), (302, 69410), (604, 34705), (631, 33220), (755, 27764), (1262, 16610), (1510, 13882), (1661, 12620), (2524, 8305), (3020, 6941), (3155, 6644), (3322, 6310)]