20801220

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31517}}^1$

素因数の和:31540

約数の個数: 48

約数和(自身を含む): 63540288

約数和(自身を除く): 42739068

約数列:

[1, 2, 3, 4, 5, 6, 10, 11, 12, 15, 20, 22, 30, 33, 44, 55, 60, 66, 110, 132, 165, 220, 330, 660, 31517, 63034, 94551, 126068, 157585, 189102, 315170, 346687, 378204, 472755, 630340, 693374, 945510, 1040061, 1386748, 1733435, 1891020, 2080122, 3466870, 4160244, 5200305, 6933740, 10400610, 20801220]

約数ペア:

[(1, 20801220), (2, 10400610), (3, 6933740), (4, 5200305), (5, 4160244), (6, 3466870), (10, 2080122), (11, 1891020), (12, 1733435), (15, 1386748), (20, 1040061), (22, 945510), (30, 693374), (33, 630340), (44, 472755), (55, 378204), (60, 346687), (66, 315170), (110, 189102), (132, 157585), (165, 126068), (220, 94551), (330, 63034), (660, 31517)]