21965139

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{20509}}^1$

素因数の和:20539

約数の個数: 24

約数和(自身を含む): 38394720

約数和(自身を除く): 16429581

約数列:

[1, 3, 7, 9, 17, 21, 51, 63, 119, 153, 357, 1071, 20509, 61527, 143563, 184581, 348653, 430689, 1045959, 1292067, 2440571, 3137877, 7321713, 21965139]

約数ペア:

[(1, 21965139), (3, 7321713), (7, 3137877), (9, 2440571), (17, 1292067), (21, 1045959), (51, 430689), (63, 348653), (119, 184581), (153, 143563), (357, 61527), (1071, 20509)]