19945840

素因数分解:

$2^4\times 5^1\times {\mathrm{283}}^1\times {\mathrm{881}}^1$

素因数の和:1177

約数の個数: 40

約数和(自身を含む): 46590768

約数和(自身を除く): 26644928

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 283, 566, 881, 1132, 1415, 1762, 2264, 2830, 3524, 4405, 4528, 5660, 7048, 8810, 11320, 14096, 17620, 22640, 35240, 70480, 249323, 498646, 997292, 1246615, 1994584, 2493230, 3989168, 4986460, 9972920, 19945840]

約数ペア:

[(1, 19945840), (2, 9972920), (4, 4986460), (5, 3989168), (8, 2493230), (10, 1994584), (16, 1246615), (20, 997292), (40, 498646), (80, 249323), (283, 70480), (566, 35240), (881, 22640), (1132, 17620), (1415, 14096), (1762, 11320), (2264, 8810), (2830, 7048), (3524, 5660), (4405, 4528)]