20354985

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{19}}^2\times {\mathrm{179}}^1$

素因数の和:235

約数の個数: 72

約数和(自身を含む): 42793920

約数和(自身を除く): 22438935

約数列:

[1, 3, 5, 7, 9, 15, 19, 21, 35, 45, 57, 63, 95, 105, 133, 171, 179, 285, 315, 361, 399, 537, 665, 855, 895, 1083, 1197, 1253, 1611, 1805, 1995, 2527, 2685, 3249, 3401, 3759, 5415, 5985, 6265, 7581, 8055, 10203, 11277, 12635, 16245, 17005, 18795, 22743, 23807, 30609, 37905, 51015, 56385, 64619, 71421, 113715, 119035, 153045, 193857, 214263, 323095, 357105, 452333, 581571, 969285, 1071315, 1356999, 2261665, 2907855, 4070997, 6784995, 20354985]

約数ペア:

[(1, 20354985), (3, 6784995), (5, 4070997), (7, 2907855), (9, 2261665), (15, 1356999), (19, 1071315), (21, 969285), (35, 581571), (45, 452333), (57, 357105), (63, 323095), (95, 214263), (105, 193857), (133, 153045), (171, 119035), (179, 113715), (285, 71421), (315, 64619), (361, 56385), (399, 51015), (537, 37905), (665, 30609), (855, 23807), (895, 22743), (1083, 18795), (1197, 17005), (1253, 16245), (1611, 12635), (1805, 11277), (1995, 10203), (2527, 8055), (2685, 7581), (3249, 6265), (3401, 5985), (3759, 5415)]