19869550

素因数分解:

$2^1\times 5^2\times {\mathrm{401}}^1\times {\mathrm{991}}^1$

素因数の和:1404

約数の個数: 24

約数和(自身を含む): 37086912

約数和(自身を除く): 17217362

約数列:

[1, 2, 5, 10, 25, 50, 401, 802, 991, 1982, 2005, 4010, 4955, 9910, 10025, 20050, 24775, 49550, 397391, 794782, 1986955, 3973910, 9934775, 19869550]

約数ペア:

[(1, 19869550), (2, 9934775), (5, 3973910), (10, 1986955), (25, 794782), (50, 397391), (401, 49550), (802, 24775), (991, 20050), (1982, 10025), (2005, 9910), (4010, 4955)]