20901335

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{647}}^1$

素因数の和:743

約数の個数: 32

約数和(自身を含む): 31352832

約数和(自身を除く): 10451497

約数列:

[1, 5, 7, 13, 35, 65, 71, 91, 355, 455, 497, 647, 923, 2485, 3235, 4529, 4615, 6461, 8411, 22645, 32305, 42055, 45937, 58877, 229685, 294385, 321559, 597181, 1607795, 2985905, 4180267, 20901335]

約数ペア:

[(1, 20901335), (5, 4180267), (7, 2985905), (13, 1607795), (35, 597181), (65, 321559), (71, 294385), (91, 229685), (355, 58877), (455, 45937), (497, 42055), (647, 32305), (923, 22645), (2485, 8411), (3235, 6461), (4529, 4615)]