19972449

素因数分解:

$3^2\times 7^2\times {\mathrm{45289}}^1$

素因数の和:45309

約数の個数: 18

約数和(自身を含む): 33559890

約数和(自身を除く): 13587441

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 45289, 135867, 317023, 407601, 951069, 2219161, 2853207, 6657483, 19972449]

約数ペア:

[(1, 19972449), (3, 6657483), (7, 2853207), (9, 2219161), (21, 951069), (49, 407601), (63, 317023), (147, 135867), (441, 45289)]