21710900

素因数分解:

$2^2\times 5^2\times {\mathrm{199}}^1\times {\mathrm{1091}}^1$

素因数の和:1304

約数の個数: 36

約数和(自身を含む): 47392800

約数和(自身を除く): 25681900

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 199, 398, 796, 995, 1091, 1990, 2182, 3980, 4364, 4975, 5455, 9950, 10910, 19900, 21820, 27275, 54550, 109100, 217109, 434218, 868436, 1085545, 2171090, 4342180, 5427725, 10855450, 21710900]

約数ペア:

[(1, 21710900), (2, 10855450), (4, 5427725), (5, 4342180), (10, 2171090), (20, 1085545), (25, 868436), (50, 434218), (100, 217109), (199, 109100), (398, 54550), (796, 27275), (995, 21820), (1091, 19900), (1990, 10910), (2182, 9950), (3980, 5455), (4364, 4975)]