21560220

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{10889}}^1$

素因数の和:10915

約数の個数: 72

約数和(自身を含む): 71351280

約数和(自身を除く): 49791060

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 30, 33, 36, 44, 45, 55, 60, 66, 90, 99, 110, 132, 165, 180, 198, 220, 330, 396, 495, 660, 990, 1980, 10889, 21778, 32667, 43556, 54445, 65334, 98001, 108890, 119779, 130668, 163335, 196002, 217780, 239558, 326670, 359337, 392004, 479116, 490005, 598895, 653340, 718674, 980010, 1078011, 1197790, 1437348, 1796685, 1960020, 2156022, 2395580, 3593370, 4312044, 5390055, 7186740, 10780110, 21560220]

約数ペア:

[(1, 21560220), (2, 10780110), (3, 7186740), (4, 5390055), (5, 4312044), (6, 3593370), (9, 2395580), (10, 2156022), (11, 1960020), (12, 1796685), (15, 1437348), (18, 1197790), (20, 1078011), (22, 980010), (30, 718674), (33, 653340), (36, 598895), (44, 490005), (45, 479116), (55, 392004), (60, 359337), (66, 326670), (90, 239558), (99, 217780), (110, 196002), (132, 163335), (165, 130668), (180, 119779), (198, 108890), (220, 98001), (330, 65334), (396, 54445), (495, 43556), (660, 32667), (990, 21778), (1980, 10889)]