19797580

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89989}}^1$

素因数の和:90009

約数の個数: 24

約数和(自身を含む): 45354960

約数和(自身を除く): 25557380

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 89989, 179978, 359956, 449945, 899890, 989879, 1799780, 1979758, 3959516, 4949395, 9898790, 19797580]

約数ペア:

[(1, 19797580), (2, 9898790), (4, 4949395), (5, 3959516), (10, 1979758), (11, 1799780), (20, 989879), (22, 899890), (44, 449945), (55, 359956), (110, 179978), (220, 89989)]