311442920

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{109663}}^1$

素因数の和:109745

約数の個数: 32

約数和(自身を含む): 710622720

約数和(自身を除く): 399179800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 109663, 219326, 438652, 548315, 877304, 1096630, 2193260, 4386520, 7786073, 15572146, 31144292, 38930365, 62288584, 77860730, 155721460, 311442920]

約数ペア:

[(1, 311442920), (2, 155721460), (4, 77860730), (5, 62288584), (8, 38930365), (10, 31144292), (20, 15572146), (40, 7786073), (71, 4386520), (142, 2193260), (284, 1096630), (355, 877304), (568, 548315), (710, 438652), (1420, 219326), (2840, 109663)]