21801978

素因数分解:

$2^1\times 3^2\times {\mathrm{11}}^1\times {\mathrm{149}}^1\times {\mathrm{739}}^1$

素因数の和:907

約数の個数: 48

約数和(自身を含む): 51948000

約数和(自身を除く): 30146022

約数列:

[1, 2, 3, 6, 9, 11, 18, 22, 33, 66, 99, 149, 198, 298, 447, 739, 894, 1341, 1478, 1639, 2217, 2682, 3278, 4434, 4917, 6651, 8129, 9834, 13302, 14751, 16258, 24387, 29502, 48774, 73161, 110111, 146322, 220222, 330333, 660666, 990999, 1211221, 1981998, 2422442, 3633663, 7267326, 10900989, 21801978]

約数ペア:

[(1, 21801978), (2, 10900989), (3, 7267326), (6, 3633663), (9, 2422442), (11, 1981998), (18, 1211221), (22, 990999), (33, 660666), (66, 330333), (99, 220222), (149, 146322), (198, 110111), (298, 73161), (447, 48774), (739, 29502), (894, 24387), (1341, 16258), (1478, 14751), (1639, 13302), (2217, 9834), (2682, 8129), (3278, 6651), (4434, 4917)]