21639513

素因数分解:

$3^1\times 7^1\times {\mathrm{41}}^2\times {\mathrm{613}}^1$

素因数の和:705

約数の個数: 24

約数和(自身を含む): 33853504

約数和(自身を除く): 12213991

約数列:

[1, 3, 7, 21, 41, 123, 287, 613, 861, 1681, 1839, 4291, 5043, 11767, 12873, 25133, 35301, 75399, 175931, 527793, 1030453, 3091359, 7213171, 21639513]

約数ペア:

[(1, 21639513), (3, 7213171), (7, 3091359), (21, 1030453), (41, 527793), (123, 175931), (287, 75399), (613, 35301), (861, 25133), (1681, 12873), (1839, 11767), (4291, 5043)]