21805979

素因数分解:

${\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{89}}^1\times {\mathrm{401}}^1$

素因数の和:550

約数の個数: 16

約数和(自身を含む): 24312960

約数和(自身を除く): 2506981

約数列:

[1, 13, 47, 89, 401, 611, 1157, 4183, 5213, 18847, 35689, 54379, 245011, 463957, 1677383, 21805979]

約数ペア:

[(1, 21805979), (13, 1677383), (47, 463957), (89, 245011), (401, 54379), (611, 35689), (1157, 18847), (4183, 5213)]