20379160

素因数分解:

$2^3\times 5^1\times {\mathrm{499}}^1\times {\mathrm{1021}}^1$

素因数の和:1531

約数の個数: 32

約数和(自身を含む): 45990000

約数和(自身を除く): 25610840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 499, 998, 1021, 1996, 2042, 2495, 3992, 4084, 4990, 5105, 8168, 9980, 10210, 19960, 20420, 40840, 509479, 1018958, 2037916, 2547395, 4075832, 5094790, 10189580, 20379160]

約数ペア:

[(1, 20379160), (2, 10189580), (4, 5094790), (5, 4075832), (8, 2547395), (10, 2037916), (20, 1018958), (40, 509479), (499, 40840), (998, 20420), (1021, 19960), (1996, 10210), (2042, 9980), (2495, 8168), (3992, 5105), (4084, 4990)]