19949920

素因数分解:

$2^5\times 5^1\times {\mathrm{67}}^1\times {\mathrm{1861}}^1$

素因数の和:1943

約数の個数: 48

約数和(自身を含む): 47860848

約数和(自身を除く): 27910928

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 67, 80, 134, 160, 268, 335, 536, 670, 1072, 1340, 1861, 2144, 2680, 3722, 5360, 7444, 9305, 10720, 14888, 18610, 29776, 37220, 59552, 74440, 124687, 148880, 249374, 297760, 498748, 623435, 997496, 1246870, 1994992, 2493740, 3989984, 4987480, 9974960, 19949920]

約数ペア:

[(1, 19949920), (2, 9974960), (4, 4987480), (5, 3989984), (8, 2493740), (10, 1994992), (16, 1246870), (20, 997496), (32, 623435), (40, 498748), (67, 297760), (80, 249374), (134, 148880), (160, 124687), (268, 74440), (335, 59552), (536, 37220), (670, 29776), (1072, 18610), (1340, 14888), (1861, 10720), (2144, 9305), (2680, 7444), (3722, 5360)]