21070120

素因数分解:

$2^3\times 5^1\times {\mathrm{199}}^1\times {\mathrm{2647}}^1$

素因数の和:2857

約数の個数: 32

約数和(自身を含む): 47664000

約数和(自身を除く): 26593880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 199, 398, 796, 995, 1592, 1990, 2647, 3980, 5294, 7960, 10588, 13235, 21176, 26470, 52940, 105880, 526753, 1053506, 2107012, 2633765, 4214024, 5267530, 10535060, 21070120]

約数ペア:

[(1, 21070120), (2, 10535060), (4, 5267530), (5, 4214024), (8, 2633765), (10, 2107012), (20, 1053506), (40, 526753), (199, 105880), (398, 52940), (796, 26470), (995, 21176), (1592, 13235), (1990, 10588), (2647, 7960), (3980, 5294)]