18891405

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{751}}^1$

素因数の和:818

約数の個数: 48

約数和(自身を含む): 36132096

約数和(自身を除く): 17240691

約数列:

[1, 3, 5, 9, 13, 15, 39, 43, 45, 65, 117, 129, 195, 215, 387, 559, 585, 645, 751, 1677, 1935, 2253, 2795, 3755, 5031, 6759, 8385, 9763, 11265, 25155, 29289, 32293, 33795, 48815, 87867, 96879, 146445, 161465, 290637, 419809, 439335, 484395, 1259427, 1453185, 2099045, 3778281, 6297135, 18891405]

約数ペア:

[(1, 18891405), (3, 6297135), (5, 3778281), (9, 2099045), (13, 1453185), (15, 1259427), (39, 484395), (43, 439335), (45, 419809), (65, 290637), (117, 161465), (129, 146445), (195, 96879), (215, 87867), (387, 48815), (559, 33795), (585, 32293), (645, 29289), (751, 25155), (1677, 11265), (1935, 9763), (2253, 8385), (2795, 6759), (3755, 5031)]