19904445

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{509}}^1$

素因数の和:610

約数の個数: 48

約数和(自身を含む): 38188800

約数和(自身を除く): 18284355

約数列:

[1, 3, 5, 9, 11, 15, 33, 45, 55, 79, 99, 165, 237, 395, 495, 509, 711, 869, 1185, 1527, 2545, 2607, 3555, 4345, 4581, 5599, 7635, 7821, 13035, 16797, 22905, 27995, 39105, 40211, 50391, 83985, 120633, 201055, 251955, 361899, 442321, 603165, 1326963, 1809495, 2211605, 3980889, 6634815, 19904445]

約数ペア:

[(1, 19904445), (3, 6634815), (5, 3980889), (9, 2211605), (11, 1809495), (15, 1326963), (33, 603165), (45, 442321), (55, 361899), (79, 251955), (99, 201055), (165, 120633), (237, 83985), (395, 50391), (495, 40211), (509, 39105), (711, 27995), (869, 22905), (1185, 16797), (1527, 13035), (2545, 7821), (2607, 7635), (3555, 5599), (4345, 4581)]