21658945

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{557}}^1$

素因数の和:681

約数の個数: 32

約数和(自身を含む): 32783616

約数和(自身を除く): 11124671

約数列:

[1, 5, 7, 11, 35, 55, 77, 101, 385, 505, 557, 707, 1111, 2785, 3535, 3899, 5555, 6127, 7777, 19495, 30635, 38885, 42889, 56257, 214445, 281285, 393799, 618827, 1968995, 3094135, 4331789, 21658945]

約数ペア:

[(1, 21658945), (5, 4331789), (7, 3094135), (11, 1968995), (35, 618827), (55, 393799), (77, 281285), (101, 214445), (385, 56257), (505, 42889), (557, 38885), (707, 30635), (1111, 19495), (2785, 7777), (3535, 6127), (3899, 5555)]