20628855

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{179}}^1\times {\mathrm{197}}^1$

素因数の和:400

約数の個数: 48

約数和(自身を含む): 38918880

約数和(自身を除く): 18290025

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 65, 117, 179, 195, 197, 537, 585, 591, 895, 985, 1611, 1773, 2327, 2561, 2685, 2955, 6981, 7683, 8055, 8865, 11635, 12805, 20943, 23049, 34905, 35263, 38415, 104715, 105789, 115245, 176315, 317367, 458419, 528945, 1375257, 1586835, 2292095, 4125771, 6876285, 20628855]

約数ペア:

[(1, 20628855), (3, 6876285), (5, 4125771), (9, 2292095), (13, 1586835), (15, 1375257), (39, 528945), (45, 458419), (65, 317367), (117, 176315), (179, 115245), (195, 105789), (197, 104715), (537, 38415), (585, 35263), (591, 34905), (895, 23049), (985, 20943), (1611, 12805), (1773, 11635), (2327, 8865), (2561, 8055), (2685, 7683), (2955, 6981)]