20515664

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{1861}}^1$

素因数の和:1935

約数の個数: 40

約数和(自身を含む): 43637832

約数和(自身を除く): 23122168

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 53, 104, 106, 208, 212, 424, 689, 848, 1378, 1861, 2756, 3722, 5512, 7444, 11024, 14888, 24193, 29776, 48386, 96772, 98633, 193544, 197266, 387088, 394532, 789064, 1282229, 1578128, 2564458, 5128916, 10257832, 20515664]

約数ペア:

[(1, 20515664), (2, 10257832), (4, 5128916), (8, 2564458), (13, 1578128), (16, 1282229), (26, 789064), (52, 394532), (53, 387088), (104, 197266), (106, 193544), (208, 98633), (212, 96772), (424, 48386), (689, 29776), (848, 24193), (1378, 14888), (1861, 11024), (2756, 7444), (3722, 5512)]