20666690

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{2111}}^1$

素因数の和:2218

約数の個数: 32

約数和(自身を含む): 41057280

約数和(自身を除く): 20390590

約数列:

[1, 2, 5, 10, 11, 22, 55, 89, 110, 178, 445, 890, 979, 1958, 2111, 4222, 4895, 9790, 10555, 21110, 23221, 46442, 116105, 187879, 232210, 375758, 939395, 1878790, 2066669, 4133338, 10333345, 20666690]

約数ペア:

[(1, 20666690), (2, 10333345), (5, 4133338), (10, 2066669), (11, 1878790), (22, 939395), (55, 375758), (89, 232210), (110, 187879), (178, 116105), (445, 46442), (890, 23221), (979, 21110), (1958, 10555), (2111, 9790), (4222, 4895)]