21308091

素因数分解:

$3^1\times 7^2\times {\mathrm{43}}^1\times {\mathrm{3371}}^1$

素因数の和:3431

約数の個数: 24

約数和(自身を含む): 33827904

約数和(自身を除く): 12519813

約数列:

[1, 3, 7, 21, 43, 49, 129, 147, 301, 903, 2107, 3371, 6321, 10113, 23597, 70791, 144953, 165179, 434859, 495537, 1014671, 3044013, 7102697, 21308091]

約数ペア:

[(1, 21308091), (3, 7102697), (7, 3044013), (21, 1014671), (43, 495537), (49, 434859), (129, 165179), (147, 144953), (301, 70791), (903, 23597), (2107, 10113), (3371, 6321)]