18990975

素因数分解:

$3^1\times 5^2\times {\mathrm{19}}^1\times {\mathrm{13327}}^1$

素因数の和:13359

約数の個数: 24

約数和(自身を含む): 33053440

約数和(自身を除く): 14062465

約数列:

[1, 3, 5, 15, 19, 25, 57, 75, 95, 285, 475, 1425, 13327, 39981, 66635, 199905, 253213, 333175, 759639, 999525, 1266065, 3798195, 6330325, 18990975]

約数ペア:

[(1, 18990975), (3, 6330325), (5, 3798195), (15, 1266065), (19, 999525), (25, 759639), (57, 333175), (75, 253213), (95, 199905), (285, 66635), (475, 39981), (1425, 13327)]