21189509

素因数分解:

${\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{1373}}^1$

素因数の和:1468

約数の個数: 16

約数和(自身を含む): 24534144

約数和(自身を除く): 3344635

約数列:

[1, 11, 23, 61, 253, 671, 1373, 1403, 15103, 15433, 31579, 83753, 347369, 921283, 1926319, 21189509]

約数ペア:

[(1, 21189509), (11, 1926319), (23, 921283), (61, 347369), (253, 83753), (671, 31579), (1373, 15433), (1403, 15103)]