18901905

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{97}}^1\times {\mathrm{1181}}^1$

素因数の和:1297

約数の個数: 32

約数和(自身を含む): 33360768

約数和(自身を除く): 14458863

約数列:

[1, 3, 5, 11, 15, 33, 55, 97, 165, 291, 485, 1067, 1181, 1455, 3201, 3543, 5335, 5905, 12991, 16005, 17715, 38973, 64955, 114557, 194865, 343671, 572785, 1260127, 1718355, 3780381, 6300635, 18901905]

約数ペア:

[(1, 18901905), (3, 6300635), (5, 3780381), (11, 1718355), (15, 1260127), (33, 572785), (55, 343671), (97, 194865), (165, 114557), (291, 64955), (485, 38973), (1067, 17715), (1181, 16005), (1455, 12991), (3201, 5905), (3543, 5335)]