21091315

素因数分解:

$5^1\times 7^2\times {\mathrm{31}}^1\times {\mathrm{2777}}^1$

素因数の和:2827

約数の個数: 24

約数和(自身を含む): 30402432

約数和(自身を除く): 9311117

約数列:

[1, 5, 7, 31, 35, 49, 155, 217, 245, 1085, 1519, 2777, 7595, 13885, 19439, 86087, 97195, 136073, 430435, 602609, 680365, 3013045, 4218263, 21091315]

約数ペア:

[(1, 21091315), (5, 4218263), (7, 3013045), (31, 680365), (35, 602609), (49, 430435), (155, 136073), (217, 97195), (245, 86087), (1085, 19439), (1519, 13885), (2777, 7595)]