2687740

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{643}}^1$

素因数の和:682

約数の個数: 48

約数和(自身を含む): 6491520

約数和(自身を除く): 3803780

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 38, 44, 55, 76, 95, 110, 190, 209, 220, 380, 418, 643, 836, 1045, 1286, 2090, 2572, 3215, 4180, 6430, 7073, 12217, 12860, 14146, 24434, 28292, 35365, 48868, 61085, 70730, 122170, 134387, 141460, 244340, 268774, 537548, 671935, 1343870, 2687740]

約数ペア:

[(1, 2687740), (2, 1343870), (4, 671935), (5, 537548), (10, 268774), (11, 244340), (19, 141460), (20, 134387), (22, 122170), (38, 70730), (44, 61085), (55, 48868), (76, 35365), (95, 28292), (110, 24434), (190, 14146), (209, 12860), (220, 12217), (380, 7073), (418, 6430), (643, 4180), (836, 3215), (1045, 2572), (1286, 2090)]