19828221

素因数分解:

$3^1\times 7^1\times {\mathrm{89}}^1\times {\mathrm{103}}^2$

素因数の和:305

約数の個数: 24

約数和(自身を含む): 30853440

約数和(自身を除く): 11025219

約数列:

[1, 3, 7, 21, 89, 103, 267, 309, 623, 721, 1869, 2163, 9167, 10609, 27501, 31827, 64169, 74263, 192507, 222789, 944201, 2832603, 6609407, 19828221]

約数ペア:

[(1, 19828221), (3, 6609407), (7, 2832603), (21, 944201), (89, 222789), (103, 192507), (267, 74263), (309, 64169), (623, 31827), (721, 27501), (1869, 10609), (2163, 9167)]