21200505

素因数分解:

$3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{32869}}^1$

素因数の和:32920

約数の個数: 16

約数和(自身を含む): 34710720

約数和(自身を除く): 13510215

約数列:

[1, 3, 5, 15, 43, 129, 215, 645, 32869, 98607, 164345, 493035, 1413367, 4240101, 7066835, 21200505]

約数ペア:

[(1, 21200505), (3, 7066835), (5, 4240101), (15, 1413367), (43, 493035), (129, 164345), (215, 98607), (645, 32869)]