21503573

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{12437}}^1$

素因数の和:12476

約数の個数: 16

約数和(自身を含む): 27861120

約数和(自身を除く): 6357547

約数列:

[1, 7, 13, 19, 91, 133, 247, 1729, 12437, 87059, 161681, 236303, 1131767, 1654121, 3071939, 21503573]

約数ペア:

[(1, 21503573), (7, 3071939), (13, 1654121), (19, 1131767), (91, 236303), (133, 161681), (247, 87059), (1729, 12437)]