19797561

素因数分解:

$3^3\times 7^1\times {\mathrm{31}}^2\times {\mathrm{109}}^1$

素因数の和:187

約数の個数: 48

約数和(自身を含む): 34953600

約数和(自身を除く): 15156039

約数列:

[1, 3, 7, 9, 21, 27, 31, 63, 93, 109, 189, 217, 279, 327, 651, 763, 837, 961, 981, 1953, 2289, 2883, 2943, 3379, 5859, 6727, 6867, 8649, 10137, 20181, 20601, 23653, 25947, 30411, 60543, 70959, 91233, 104749, 181629, 212877, 314247, 638631, 733243, 942741, 2199729, 2828223, 6599187, 19797561]

約数ペア:

[(1, 19797561), (3, 6599187), (7, 2828223), (9, 2199729), (21, 942741), (27, 733243), (31, 638631), (63, 314247), (93, 212877), (109, 181629), (189, 104749), (217, 91233), (279, 70959), (327, 60543), (651, 30411), (763, 25947), (837, 23653), (961, 20601), (981, 20181), (1953, 10137), (2289, 8649), (2883, 6867), (2943, 6727), (3379, 5859)]