20757261

素因数分解:

$3^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{127}}^1\times {\mathrm{181}}^1$

素因数の和:361

約数の個数: 32

約数和(自身を含む): 32800768

約数和(自身を除く): 12043507

約数列:

[1, 3, 7, 21, 43, 127, 129, 181, 301, 381, 543, 889, 903, 1267, 2667, 3801, 5461, 7783, 16383, 22987, 23349, 38227, 54481, 68961, 114681, 160909, 163443, 482727, 988441, 2965323, 6919087, 20757261]

約数ペア:

[(1, 20757261), (3, 6919087), (7, 2965323), (21, 988441), (43, 482727), (127, 163443), (129, 160909), (181, 114681), (301, 68961), (381, 54481), (543, 38227), (889, 23349), (903, 22987), (1267, 16383), (2667, 7783), (3801, 5461)]