318278320

素因数分解:

$2^4\times 5^1\times {\mathrm{3978479}}^1$

素因数の和:3978492

約数の個数: 20

約数和(自身を含む): 739997280

約数和(自身を除く): 421718960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 3978479, 7956958, 15913916, 19892395, 31827832, 39784790, 63655664, 79569580, 159139160, 318278320]

約数ペア:

[(1, 318278320), (2, 159139160), (4, 79569580), (5, 63655664), (8, 39784790), (10, 31827832), (16, 19892395), (20, 15913916), (40, 7956958), (80, 3978479)]