21581992

素因数分解:

$2^3\times {\mathrm{83}}^1\times {\mathrm{32503}}^1$

素因数の和:32592

約数の個数: 16

約数和(自身を含む): 40955040

約数和(自身を除く): 19373048

約数列:

[1, 2, 4, 8, 83, 166, 332, 664, 32503, 65006, 130012, 260024, 2697749, 5395498, 10790996, 21581992]

約数ペア:

[(1, 21581992), (2, 10790996), (4, 5395498), (8, 2697749), (83, 260024), (166, 130012), (332, 65006), (664, 32503)]