20554220

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{13009}}^1$

素因数の和:13097

約数の個数: 24

約数和(自身を含む): 43713600

約数和(自身を除く): 23159380

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 13009, 26018, 52036, 65045, 130090, 260180, 1027711, 2055422, 4110844, 5138555, 10277110, 20554220]

約数ペア:

[(1, 20554220), (2, 10277110), (4, 5138555), (5, 4110844), (10, 2055422), (20, 1027711), (79, 260180), (158, 130090), (316, 65045), (395, 52036), (790, 26018), (1580, 13009)]