21392005

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{83}}^1\times {\mathrm{2713}}^1$

素因数の和:2820

約数の個数: 16

約数和(自身を含む): 27357120

約数和(自身を除く): 5965115

約数列:

[1, 5, 19, 83, 95, 415, 1577, 2713, 7885, 13565, 51547, 225179, 257735, 1125895, 4278401, 21392005]

約数ペア:

[(1, 21392005), (5, 4278401), (19, 1125895), (83, 257735), (95, 225179), (415, 51547), (1577, 13565), (2713, 7885)]