388400740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{213407}}^1$

素因数の和:213436

約数の個数: 48

約数和(自身を含む): 1003871232

約数和(自身を除く): 615470492

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 455, 910, 1820, 213407, 426814, 853628, 1067035, 1493849, 2134070, 2774291, 2987698, 4268140, 5548582, 5975396, 7469245, 11097164, 13871455, 14938490, 19420037, 27742910, 29876980, 38840074, 55485820, 77680148, 97100185, 194200370, 388400740]

約数ペア:

[(1, 388400740), (2, 194200370), (4, 97100185), (5, 77680148), (7, 55485820), (10, 38840074), (13, 29876980), (14, 27742910), (20, 19420037), (26, 14938490), (28, 13871455), (35, 11097164), (52, 7469245), (65, 5975396), (70, 5548582), (91, 4268140), (130, 2987698), (140, 2774291), (182, 2134070), (260, 1493849), (364, 1067035), (455, 853628), (910, 426814), (1820, 213407)]