19910495

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{563}}^1\times {\mathrm{643}}^1$

素因数の和:1222

約数の個数: 16

約数和(自身を含む): 26151552

約数和(自身を除く): 6241057

約数列:

[1, 5, 11, 55, 563, 643, 2815, 3215, 6193, 7073, 30965, 35365, 362009, 1810045, 3982099, 19910495]

約数ペア:

[(1, 19910495), (5, 3982099), (11, 1810045), (55, 362009), (563, 35365), (643, 30965), (2815, 7073), (3215, 6193)]