21138455

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{313}}^1\times {\mathrm{1039}}^1$

素因数の和:1370

約数の個数: 16

約数和(自身を含む): 27431040

約数和(自身を除く): 6292585

約数列:

[1, 5, 13, 65, 313, 1039, 1565, 4069, 5195, 13507, 20345, 67535, 325207, 1626035, 4227691, 21138455]

約数ペア:

[(1, 21138455), (5, 4227691), (13, 1626035), (65, 325207), (313, 67535), (1039, 20345), (1565, 13507), (4069, 5195)]