21281947

素因数分解:

${\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{83}}^1\times {\mathrm{89}}^1$

素因数の和:282

約数の個数: 16

約数和(自身を含む): 22619520

約数和(自身を除く): 1337573

約数列:

[1, 43, 67, 83, 89, 2881, 3569, 3827, 5561, 5963, 7387, 239123, 256409, 317641, 494929, 21281947]

約数ペア:

[(1, 21281947), (43, 494929), (67, 317641), (83, 256409), (89, 239123), (2881, 7387), (3569, 5963), (3827, 5561)]