219981025

素因数分解:

$5^2\times {\mathrm{11}}^4\times {\mathrm{601}}^1$

素因数の和:655

約数の個数: 30

約数和(自身を含む): 300551510

約数和(自身を除く): 80570485

約数列:

[1, 5, 11, 25, 55, 121, 275, 601, 605, 1331, 3005, 3025, 6611, 6655, 14641, 15025, 33055, 33275, 72721, 73205, 165275, 363605, 366025, 799931, 1818025, 3999655, 8799241, 19998275, 43996205, 219981025]

約数ペア:

[(1, 219981025), (5, 43996205), (11, 19998275), (25, 8799241), (55, 3999655), (121, 1818025), (275, 799931), (601, 366025), (605, 363605), (1331, 165275), (3005, 73205), (3025, 72721), (6611, 33275), (6655, 33055), (14641, 15025)]