18969665

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{617}}^1$

素因数の和:689

約数の個数: 32

約数和(自身を含む): 27409536

約数和(自身を除く): 8439871

約数列:

[1, 5, 11, 13, 43, 55, 65, 143, 215, 473, 559, 617, 715, 2365, 2795, 3085, 6149, 6787, 8021, 26531, 30745, 33935, 40105, 88231, 132655, 291841, 344903, 441155, 1459205, 1724515, 3793933, 18969665]

約数ペア:

[(1, 18969665), (5, 3793933), (11, 1724515), (13, 1459205), (43, 441155), (55, 344903), (65, 291841), (143, 132655), (215, 88231), (473, 40105), (559, 33935), (617, 30745), (715, 26531), (2365, 8021), (2795, 6787), (3085, 6149)]