28778519

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{61}}^1\times {\mathrm{557}}^1$

素因数の和:647

約数の個数: 24

約数和(自身を含む): 36810144

約数和(自身を除く): 8031625

約数列:

[1, 7, 11, 61, 77, 121, 427, 557, 671, 847, 3899, 4697, 6127, 7381, 33977, 42889, 51667, 67397, 237839, 373747, 471779, 2616229, 4111217, 28778519]

約数ペア:

[(1, 28778519), (7, 4111217), (11, 2616229), (61, 471779), (77, 373747), (121, 237839), (427, 67397), (557, 51667), (671, 42889), (847, 33977), (3899, 7381), (4697, 6127)]