19881320

素因数分解:

$2^3\times 5^1\times {\mathrm{307}}^1\times {\mathrm{1619}}^1$

素因数の和:1937

約数の個数: 32

約数和(自身を含む): 44906400

約数和(自身を除く): 25025080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 307, 614, 1228, 1535, 1619, 2456, 3070, 3238, 6140, 6476, 8095, 12280, 12952, 16190, 32380, 64760, 497033, 994066, 1988132, 2485165, 3976264, 4970330, 9940660, 19881320]

約数ペア:

[(1, 19881320), (2, 9940660), (4, 4970330), (5, 3976264), (8, 2485165), (10, 1988132), (20, 994066), (40, 497033), (307, 64760), (614, 32380), (1228, 16190), (1535, 12952), (1619, 12280), (2456, 8095), (3070, 6476), (3238, 6140)]