18821420

素因数分解:

$2^2\times 5^1\times {\mathrm{199}}^1\times {\mathrm{4729}}^1$

素因数の和:4937

約数の個数: 24

約数和(自身を含む): 39732000

約数和(自身を除く): 20910580

約数列:

[1, 2, 4, 5, 10, 20, 199, 398, 796, 995, 1990, 3980, 4729, 9458, 18916, 23645, 47290, 94580, 941071, 1882142, 3764284, 4705355, 9410710, 18821420]

約数ペア:

[(1, 18821420), (2, 9410710), (4, 4705355), (5, 3764284), (10, 1882142), (20, 941071), (199, 94580), (398, 47290), (796, 23645), (995, 18916), (1990, 9458), (3980, 4729)]