20291985

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{197}}^1$

素因数の和:327

約数の個数: 64

約数和(自身を含む): 41817600

約数和(自身を除く): 21525615

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 105, 109, 135, 189, 197, 315, 327, 545, 591, 763, 945, 981, 985, 1379, 1635, 1773, 2289, 2943, 2955, 3815, 4137, 4905, 5319, 6867, 6895, 8865, 11445, 12411, 14715, 20601, 20685, 21473, 26595, 34335, 37233, 62055, 64419, 103005, 107365, 150311, 186165, 193257, 322095, 450933, 579771, 751555, 966285, 1352799, 2254665, 2898855, 4058397, 6763995, 20291985]

約数ペア:

[(1, 20291985), (3, 6763995), (5, 4058397), (7, 2898855), (9, 2254665), (15, 1352799), (21, 966285), (27, 751555), (35, 579771), (45, 450933), (63, 322095), (105, 193257), (109, 186165), (135, 150311), (189, 107365), (197, 103005), (315, 64419), (327, 62055), (545, 37233), (591, 34335), (763, 26595), (945, 21473), (981, 20685), (985, 20601), (1379, 14715), (1635, 12411), (1773, 11445), (2289, 8865), (2943, 6895), (2955, 6867), (3815, 5319), (4137, 4905)]