19998275

素因数分解:

$5^2\times {\mathrm{11}}^3\times {\mathrm{601}}^1$

素因数の和:644

約数の個数: 24

約数和(自身を含む): 27321168

約数和(自身を除く): 7322893

約数列:

[1, 5, 11, 25, 55, 121, 275, 601, 605, 1331, 3005, 3025, 6611, 6655, 15025, 33055, 33275, 72721, 165275, 363605, 799931, 1818025, 3999655, 19998275]

約数ペア:

[(1, 19998275), (5, 3999655), (11, 1818025), (25, 799931), (55, 363605), (121, 165275), (275, 72721), (601, 33275), (605, 33055), (1331, 15025), (3005, 6655), (3025, 6611)]