20402965

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{409}}^1\times {\mathrm{907}}^1$

素因数の和:1332

約数の個数: 16

約数和(自身を含む): 26804160

約数和(自身を除く): 6401195

約数列:

[1, 5, 11, 55, 409, 907, 2045, 4499, 4535, 9977, 22495, 49885, 370963, 1854815, 4080593, 20402965]

約数ペア:

[(1, 20402965), (5, 4080593), (11, 1854815), (55, 370963), (409, 49885), (907, 22495), (2045, 9977), (4499, 4535)]