20691605

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{23}}^1\times {\mathrm{1487}}^1$

素因数の和:1537

約数の個数: 24

約数和(自身を含む): 28498176

約数和(自身を除く): 7806571

約数列:

[1, 5, 11, 23, 55, 115, 121, 253, 605, 1265, 1487, 2783, 7435, 13915, 16357, 34201, 81785, 171005, 179927, 376211, 899635, 1881055, 4138321, 20691605]

約数ペア:

[(1, 20691605), (5, 4138321), (11, 1881055), (23, 899635), (55, 376211), (115, 179927), (121, 171005), (253, 81785), (605, 34201), (1265, 16357), (1487, 13915), (2783, 7435)]