21026456

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{3917}}^1$

素因数の和:3995

約数の個数: 32

約数和(自身を含む): 43724880

約数和(自身を除く): 22698424

約数列:

[1, 2, 4, 8, 11, 22, 44, 61, 88, 122, 244, 488, 671, 1342, 2684, 3917, 5368, 7834, 15668, 31336, 43087, 86174, 172348, 238937, 344696, 477874, 955748, 1911496, 2628307, 5256614, 10513228, 21026456]

約数ペア:

[(1, 21026456), (2, 10513228), (4, 5256614), (8, 2628307), (11, 1911496), (22, 955748), (44, 477874), (61, 344696), (88, 238937), (122, 172348), (244, 86174), (488, 43087), (671, 31336), (1342, 15668), (2684, 7834), (3917, 5368)]