21741395

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{6311}}^1$

素因数の和:6382

約数の個数: 16

約数和(自身を含む): 28631232

約数和(自身を除く): 6889837

約数列:

[1, 5, 13, 53, 65, 265, 689, 3445, 6311, 31555, 82043, 334483, 410215, 1672415, 4348279, 21741395]

約数ペア:

[(1, 21741395), (5, 4348279), (13, 1672415), (53, 410215), (65, 334483), (265, 82043), (689, 31555), (3445, 6311)]