19721320

素因数分解:

$2^3\times 5^1\times {\mathrm{139}}^1\times {\mathrm{3547}}^1$

素因数の和:3697

約数の個数: 32

約数和(自身を含む): 44704800

約数和(自身を除く): 24983480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 139, 278, 556, 695, 1112, 1390, 2780, 3547, 5560, 7094, 14188, 17735, 28376, 35470, 70940, 141880, 493033, 986066, 1972132, 2465165, 3944264, 4930330, 9860660, 19721320]

約数ペア:

[(1, 19721320), (2, 9860660), (4, 4930330), (5, 3944264), (8, 2465165), (10, 1972132), (20, 986066), (40, 493033), (139, 141880), (278, 70940), (556, 35470), (695, 28376), (1112, 17735), (1390, 14188), (2780, 7094), (3547, 5560)]