19987227

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{1229}}^1$

素因数の和:1387

約数の個数: 24

約数和(自身を含む): 31340400

約数和(自身を除く): 11353173

約数列:

[1, 3, 9, 13, 39, 117, 139, 417, 1229, 1251, 1807, 3687, 5421, 11061, 15977, 16263, 47931, 143793, 170831, 512493, 1537479, 2220803, 6662409, 19987227]

約数ペア:

[(1, 19987227), (3, 6662409), (9, 2220803), (13, 1537479), (39, 512493), (117, 170831), (139, 143793), (417, 47931), (1229, 16263), (1251, 15977), (1807, 11061), (3687, 5421)]