644404

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{139}}^1$

素因数の和:223

約数の個数: 24

約数和(自身を含む): 1215200

約数和(自身を除く): 570796

約数列:

[1, 2, 4, 19, 38, 61, 76, 122, 139, 244, 278, 556, 1159, 2318, 2641, 4636, 5282, 8479, 10564, 16958, 33916, 161101, 322202, 644404]

約数ペア:

[(1, 644404), (2, 322202), (4, 161101), (19, 33916), (38, 16958), (61, 10564), (76, 8479), (122, 5282), (139, 4636), (244, 2641), (278, 2318), (556, 1159)]