9815720

素因数分解:

$2^3\times 5^1\times {\mathrm{211}}^1\times {\mathrm{1163}}^1$

素因数の和:1385

約数の個数: 32

約数和(自身を含む): 22209120

約数和(自身を除く): 12393400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 211, 422, 844, 1055, 1163, 1688, 2110, 2326, 4220, 4652, 5815, 8440, 9304, 11630, 23260, 46520, 245393, 490786, 981572, 1226965, 1963144, 2453930, 4907860, 9815720]

約数ペア:

[(1, 9815720), (2, 4907860), (4, 2453930), (5, 1963144), (8, 1226965), (10, 981572), (20, 490786), (40, 245393), (211, 46520), (422, 23260), (844, 11630), (1055, 9304), (1163, 8440), (1688, 5815), (2110, 4652), (2326, 4220)]