20297505

素因数分解:

$3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{31469}}^1$

素因数の和:31520

約数の個数: 16

約数和(自身を含む): 33232320

約数和(自身を除く): 12934815

約数列:

[1, 3, 5, 15, 43, 129, 215, 645, 31469, 94407, 157345, 472035, 1353167, 4059501, 6765835, 20297505]

約数ペア:

[(1, 20297505), (3, 6765835), (5, 4059501), (15, 1353167), (43, 472035), (129, 157345), (215, 94407), (645, 31469)]