20986540

素因数分解:

$2^2\times 5^1\times {\mathrm{199}}^1\times {\mathrm{5273}}^1$

素因数の和:5481

約数の個数: 24

約数和(自身を含む): 44301600

約数和(自身を除く): 23315060

約数列:

[1, 2, 4, 5, 10, 20, 199, 398, 796, 995, 1990, 3980, 5273, 10546, 21092, 26365, 52730, 105460, 1049327, 2098654, 4197308, 5246635, 10493270, 20986540]

約数ペア:

[(1, 20986540), (2, 10493270), (4, 5246635), (5, 4197308), (10, 2098654), (20, 1049327), (199, 105460), (398, 52730), (796, 26365), (995, 21092), (1990, 10546), (3980, 5273)]