21206415

素因数分解:

$3^1\times 5^1\times {\mathrm{487}}^1\times {\mathrm{2903}}^1$

素因数の和:3398

約数の個数: 16

約数和(自身を含む): 34011648

約数和(自身を除く): 12805233

約数列:

[1, 3, 5, 15, 487, 1461, 2435, 2903, 7305, 8709, 14515, 43545, 1413761, 4241283, 7068805, 21206415]

約数ペア:

[(1, 21206415), (3, 7068805), (5, 4241283), (15, 1413761), (487, 43545), (1461, 14515), (2435, 8709), (2903, 7305)]