21216867

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{103}}^1\times {\mathrm{577}}^1$

素因数の和:707

約数の個数: 32

約数和(自身を含む): 34624512

約数和(自身を除く): 13407645

約数列:

[1, 3, 7, 17, 21, 51, 103, 119, 309, 357, 577, 721, 1731, 1751, 2163, 4039, 5253, 9809, 12117, 12257, 29427, 36771, 59431, 68663, 178293, 205989, 416017, 1010327, 1248051, 3030981, 7072289, 21216867]

約数ペア:

[(1, 21216867), (3, 7072289), (7, 3030981), (17, 1248051), (21, 1010327), (51, 416017), (103, 205989), (119, 178293), (309, 68663), (357, 59431), (577, 36771), (721, 29427), (1731, 12257), (1751, 12117), (2163, 9809), (4039, 5253)]