18718857

素因数分解:

$3^4\times {\mathrm{19}}^1\times {\mathrm{12163}}^1$

素因数の和:12194

約数の個数: 20

約数和(自身を含む): 29436880

約数和(自身を除く): 10718023

約数列:

[1, 3, 9, 19, 27, 57, 81, 171, 513, 1539, 12163, 36489, 109467, 231097, 328401, 693291, 985203, 2079873, 6239619, 18718857]

約数ペア:

[(1, 18718857), (3, 6239619), (9, 2079873), (19, 985203), (27, 693291), (57, 328401), (81, 231097), (171, 109467), (513, 36489), (1539, 12163)]