20808700

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{18917}}^1$

素因数の和:18942

約数の個数: 36

約数和(自身を含む): 49262472

約数和(自身を除く): 28453772

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 44, 50, 55, 100, 110, 220, 275, 550, 1100, 18917, 37834, 75668, 94585, 189170, 208087, 378340, 416174, 472925, 832348, 945850, 1040435, 1891700, 2080870, 4161740, 5202175, 10404350, 20808700]

約数ペア:

[(1, 20808700), (2, 10404350), (4, 5202175), (5, 4161740), (10, 2080870), (11, 1891700), (20, 1040435), (22, 945850), (25, 832348), (44, 472925), (50, 416174), (55, 378340), (100, 208087), (110, 189170), (220, 94585), (275, 75668), (550, 37834), (1100, 18917)]