81315280

素因数分解:

$2^4\times 5^1\times {\mathrm{1016441}}^1$

素因数の和:1016454

約数の個数: 20

約数和(自身を含む): 189058212

約数和(自身を除く): 107742932

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1016441, 2032882, 4065764, 5082205, 8131528, 10164410, 16263056, 20328820, 40657640, 81315280]

約数ペア:

[(1, 81315280), (2, 40657640), (4, 20328820), (5, 16263056), (8, 10164410), (10, 8131528), (16, 5082205), (20, 4065764), (40, 2032882), (80, 1016441)]