21779465

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{257}}^1\times {\mathrm{997}}^1$

素因数の和:1276

約数の個数: 16

約数和(自身を含む): 27808272

約数和(自身を除く): 6028807

約数列:

[1, 5, 17, 85, 257, 997, 1285, 4369, 4985, 16949, 21845, 84745, 256229, 1281145, 4355893, 21779465]

約数ペア:

[(1, 21779465), (5, 4355893), (17, 1281145), (85, 256229), (257, 84745), (997, 21845), (1285, 16949), (4369, 4985)]