20870479

素因数分解:

$7^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{1321}}^1$

素因数の和:1426

約数の個数: 16

約数和(自身を含む): 24917056

約数和(自身を除く): 4046577

約数列:

[1, 7, 37, 61, 259, 427, 1321, 2257, 9247, 15799, 48877, 80581, 342139, 564067, 2981497, 20870479]

約数ペア:

[(1, 20870479), (7, 2981497), (37, 564067), (61, 342139), (259, 80581), (427, 48877), (1321, 15799), (2257, 9247)]