21787415

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{4721}}^1$

素因数の和:4810

約数の個数: 16

約数和(自身を含む): 28558656

約数和(自身を除く): 6771241

約数列:

[1, 5, 13, 65, 71, 355, 923, 4615, 4721, 23605, 61373, 306865, 335191, 1675955, 4357483, 21787415]

約数ペア:

[(1, 21787415), (5, 4357483), (13, 1675955), (65, 335191), (71, 306865), (355, 61373), (923, 23605), (4615, 4721)]