21871745

素因数分解:

$5^1\times 7^1\times {\mathrm{83}}^1\times {\mathrm{7529}}^1$

素因数の和:7624

約数の個数: 16

約数和(自身を含む): 30360960

約数和(自身を除く): 8489215

約数列:

[1, 5, 7, 35, 83, 415, 581, 2905, 7529, 37645, 52703, 263515, 624907, 3124535, 4374349, 21871745]

約数ペア:

[(1, 21871745), (5, 4374349), (7, 3124535), (35, 624907), (83, 263515), (415, 52703), (581, 37645), (2905, 7529)]