1999525

素因数分解:

$5^2\times {\mathrm{11}}^2\times {\mathrm{661}}^1$

素因数の和:693

約数の個数: 18

約数和(自身を含む): 2729426

約数和(自身を除く): 729901

約数列:

[1, 5, 11, 25, 55, 121, 275, 605, 661, 3025, 3305, 7271, 16525, 36355, 79981, 181775, 399905, 1999525]

約数ペア:

[(1, 1999525), (5, 399905), (11, 181775), (25, 79981), (55, 36355), (121, 16525), (275, 7271), (605, 3305), (661, 3025)]