209216787

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{157}}^1\times {\mathrm{727}}^1$

素因数の和:947

約数の個数: 32

約数和(自身を含む): 309184512

約数和(自身を除く): 99967725

約数列:

[1, 3, 13, 39, 47, 141, 157, 471, 611, 727, 1833, 2041, 2181, 6123, 7379, 9451, 22137, 28353, 34169, 95927, 102507, 114139, 287781, 342417, 444197, 1332591, 1483807, 4451421, 5364533, 16093599, 69738929, 209216787]

約数ペア:

[(1, 209216787), (3, 69738929), (13, 16093599), (39, 5364533), (47, 4451421), (141, 1483807), (157, 1332591), (471, 444197), (611, 342417), (727, 287781), (1833, 114139), (2041, 102507), (2181, 95927), (6123, 34169), (7379, 28353), (9451, 22137)]