21012804

素因数分解:

$2^2\times 3^3\times {\mathrm{53}}^1\times {\mathrm{3671}}^1$

素因数の和:3737

約数の個数: 48

約数和(自身を含む): 55520640

約数和(自身を除く): 34507836

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 53, 54, 106, 108, 159, 212, 318, 477, 636, 954, 1431, 1908, 2862, 3671, 5724, 7342, 11013, 14684, 22026, 33039, 44052, 66078, 99117, 132156, 194563, 198234, 389126, 396468, 583689, 778252, 1167378, 1751067, 2334756, 3502134, 5253201, 7004268, 10506402, 21012804]

約数ペア:

[(1, 21012804), (2, 10506402), (3, 7004268), (4, 5253201), (6, 3502134), (9, 2334756), (12, 1751067), (18, 1167378), (27, 778252), (36, 583689), (53, 396468), (54, 389126), (106, 198234), (108, 194563), (159, 132156), (212, 99117), (318, 66078), (477, 44052), (636, 33039), (954, 22026), (1431, 14684), (1908, 11013), (2862, 7342), (3671, 5724)]