19856781

素因数分解:

$3^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{5167}}^1$

素因数の和:5241

約数の個数: 24

約数和(自身を含む): 33323264

約数和(自身を除く): 13466483

約数列:

[1, 3, 7, 9, 21, 61, 63, 183, 427, 549, 1281, 3843, 5167, 15501, 36169, 46503, 108507, 315187, 325521, 945561, 2206309, 2836683, 6618927, 19856781]

約数ペア:

[(1, 19856781), (3, 6618927), (7, 2836683), (9, 2206309), (21, 945561), (61, 325521), (63, 315187), (183, 108507), (427, 46503), (549, 36169), (1281, 15501), (3843, 5167)]