21781370

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{1279}}^1$

素因数の和:1430

約数の個数: 32

約数和(自身を含む): 42577920

約数和(自身を除く): 20796550

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 131, 262, 655, 1279, 1310, 1703, 2558, 3406, 6395, 8515, 12790, 16627, 17030, 33254, 83135, 166270, 167549, 335098, 837745, 1675490, 2178137, 4356274, 10890685, 21781370]

約数ペア:

[(1, 21781370), (2, 10890685), (5, 4356274), (10, 2178137), (13, 1675490), (26, 837745), (65, 335098), (130, 167549), (131, 166270), (262, 83135), (655, 33254), (1279, 17030), (1310, 16627), (1703, 12790), (2558, 8515), (3406, 6395)]