21782275

素因数分解:

$5^2\times {\mathrm{41}}^1\times {\mathrm{79}}^1\times {\mathrm{269}}^1$

素因数の和:399

約数の個数: 24

約数和(自身を含む): 28123200

約数和(自身を除く): 6340925

約数列:

[1, 5, 25, 41, 79, 205, 269, 395, 1025, 1345, 1975, 3239, 6725, 11029, 16195, 21251, 55145, 80975, 106255, 275725, 531275, 871291, 4356455, 21782275]

約数ペア:

[(1, 21782275), (5, 4356455), (25, 871291), (41, 531275), (79, 275725), (205, 106255), (269, 80975), (395, 55145), (1025, 21251), (1345, 16195), (1975, 11029), (3239, 6725)]