20998945

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{61}}^1\times {\mathrm{569}}^1$

素因数の和:657

約数の個数: 24

約数和(自身を含む): 28201320

約数和(自身を除く): 7202375

約数列:

[1, 5, 11, 55, 61, 121, 305, 569, 605, 671, 2845, 3355, 6259, 7381, 31295, 34709, 36905, 68849, 173545, 344245, 381799, 1908995, 4199789, 20998945]

約数ペア:

[(1, 20998945), (5, 4199789), (11, 1908995), (55, 381799), (61, 344245), (121, 173545), (305, 68849), (569, 36905), (605, 34709), (671, 31295), (2845, 7381), (3355, 6259)]