21178495

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{3359}}^1$

素因数の和:3474

約数の個数: 16

約数和(自身を含む): 27659520

約数和(自身を除く): 6481025

約数列:

[1, 5, 13, 65, 97, 485, 1261, 3359, 6305, 16795, 43667, 218335, 325823, 1629115, 4235699, 21178495]

約数ペア:

[(1, 21178495), (5, 4235699), (13, 1629115), (65, 325823), (97, 218335), (485, 43667), (1261, 16795), (3359, 6305)]