21768243

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{613}}^1$

素因数の和:731

約数の個数: 32

約数和(自身を含む): 35366400

約数和(自身を除く): 13598157

約数列:

[1, 3, 7, 19, 21, 57, 89, 133, 267, 399, 613, 623, 1691, 1839, 1869, 4291, 5073, 11647, 11837, 12873, 34941, 35511, 54557, 81529, 163671, 244587, 381899, 1036583, 1145697, 3109749, 7256081, 21768243]

約数ペア:

[(1, 21768243), (3, 7256081), (7, 3109749), (19, 1145697), (21, 1036583), (57, 381899), (89, 244587), (133, 163671), (267, 81529), (399, 54557), (613, 35511), (623, 34941), (1691, 12873), (1839, 11837), (1869, 11647), (4291, 5073)]