20707505

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{641}}^1$

素因数の和:737

約数の個数: 32

約数和(自身を含む): 31062528

約数和(自身を除く): 10355023

約数列:

[1, 5, 7, 13, 35, 65, 71, 91, 355, 455, 497, 641, 923, 2485, 3205, 4487, 4615, 6461, 8333, 22435, 32305, 41665, 45511, 58331, 227555, 291655, 318577, 591643, 1592885, 2958215, 4141501, 20707505]

約数ペア:

[(1, 20707505), (5, 4141501), (7, 2958215), (13, 1592885), (35, 591643), (65, 318577), (71, 291655), (91, 227555), (355, 58331), (455, 45511), (497, 41665), (641, 32305), (923, 22435), (2485, 8333), (3205, 6461), (4487, 4615)]