20678931

素因数分解:

$3^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{3607}}^1$

素因数の和:3640

約数の個数: 36

約数和(自身を含む): 37429392

約数和(自身を除く): 16750461

約数列:

[1, 3, 7, 9, 13, 21, 39, 49, 63, 91, 117, 147, 273, 441, 637, 819, 1911, 3607, 5733, 10821, 25249, 32463, 46891, 75747, 140673, 176743, 227241, 328237, 422019, 530229, 984711, 1590687, 2297659, 2954133, 6892977, 20678931]

約数ペア:

[(1, 20678931), (3, 6892977), (7, 2954133), (9, 2297659), (13, 1590687), (21, 984711), (39, 530229), (49, 422019), (63, 328237), (91, 227241), (117, 176743), (147, 140673), (273, 75747), (441, 46891), (637, 32463), (819, 25249), (1911, 10821), (3607, 5733)]