21108753

素因数分解:

$3^2\times {\mathrm{19}}^2\times {\mathrm{73}}^1\times {\mathrm{89}}^1$

素因数の和:206

約数の個数: 36

約数和(自身を含む): 32986980

約数和(自身を除く): 11878227

約数列:

[1, 3, 9, 19, 57, 73, 89, 171, 219, 267, 361, 657, 801, 1083, 1387, 1691, 3249, 4161, 5073, 6497, 12483, 15219, 19491, 26353, 32129, 58473, 79059, 96387, 123443, 237177, 289161, 370329, 1110987, 2345417, 7036251, 21108753]

約数ペア:

[(1, 21108753), (3, 7036251), (9, 2345417), (19, 1110987), (57, 370329), (73, 289161), (89, 237177), (171, 123443), (219, 96387), (267, 79059), (361, 58473), (657, 32129), (801, 26353), (1083, 19491), (1387, 15219), (1691, 12483), (3249, 6497), (4161, 5073)]