20218539

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{571}}^1$

素因数の和:651

約数の個数: 32

約数和(自身を含む): 31299840

約数和(自身を除く): 11081301

約数列:

[1, 3, 11, 29, 33, 37, 87, 111, 319, 407, 571, 957, 1073, 1221, 1713, 3219, 6281, 11803, 16559, 18843, 21127, 35409, 49677, 63381, 182149, 232397, 546447, 612683, 697191, 1838049, 6739513, 20218539]

約数ペア:

[(1, 20218539), (3, 6739513), (11, 1838049), (29, 697191), (33, 612683), (37, 546447), (87, 232397), (111, 182149), (319, 63381), (407, 49677), (571, 35409), (957, 21127), (1073, 18843), (1221, 16559), (1713, 11803), (3219, 6281)]