21157540

素因数分解:

$2^2\times 5^1\times {\mathrm{563}}^1\times {\mathrm{1879}}^1$

素因数の和:2451

約数の個数: 24

約数和(自身を含む): 44533440

約数和(自身を除く): 23375900

約数列:

[1, 2, 4, 5, 10, 20, 563, 1126, 1879, 2252, 2815, 3758, 5630, 7516, 9395, 11260, 18790, 37580, 1057877, 2115754, 4231508, 5289385, 10578770, 21157540]

約数ペア:

[(1, 21157540), (2, 10578770), (4, 5289385), (5, 4231508), (10, 2115754), (20, 1057877), (563, 37580), (1126, 18790), (1879, 11260), (2252, 9395), (2815, 7516), (3758, 5630)]