311260

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{197}}^1$

素因数の和:285

約数の個数: 24

約数和(自身を含む): 665280

約数和(自身を除く): 354020

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 197, 316, 394, 395, 788, 790, 985, 1580, 1970, 3940, 15563, 31126, 62252, 77815, 155630, 311260]

約数ペア:

[(1, 311260), (2, 155630), (4, 77815), (5, 62252), (10, 31126), (20, 15563), (79, 3940), (158, 1970), (197, 1580), (316, 985), (394, 790), (395, 788)]