20997639

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{197}}^1\times {\mathrm{911}}^1$

素因数の和:1127

約数の個数: 24

約数和(自身を含む): 32864832

約数和(自身を除く): 11867193

約数列:

[1, 3, 9, 13, 39, 117, 197, 591, 911, 1773, 2561, 2733, 7683, 8199, 11843, 23049, 35529, 106587, 179467, 538401, 1615203, 2333071, 6999213, 20997639]

約数ペア:

[(1, 20997639), (3, 6999213), (9, 2333071), (13, 1615203), (39, 538401), (117, 179467), (197, 106587), (591, 35529), (911, 23049), (1773, 11843), (2561, 8199), (2733, 7683)]