21118960

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{9103}}^1$

素因数の和:9145

約数の個数: 40

約数和(自身を含む): 50800320

約数和(自身を除く): 29681360

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 58, 80, 116, 145, 232, 290, 464, 580, 1160, 2320, 9103, 18206, 36412, 45515, 72824, 91030, 145648, 182060, 263987, 364120, 527974, 728240, 1055948, 1319935, 2111896, 2639870, 4223792, 5279740, 10559480, 21118960]

約数ペア:

[(1, 21118960), (2, 10559480), (4, 5279740), (5, 4223792), (8, 2639870), (10, 2111896), (16, 1319935), (20, 1055948), (29, 728240), (40, 527974), (58, 364120), (80, 263987), (116, 182060), (145, 145648), (232, 91030), (290, 72824), (464, 45515), (580, 36412), (1160, 18206), (2320, 9103)]