20498515

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{349}}^1\times {\mathrm{691}}^1$

素因数の和:1062

約数の個数: 16

約数和(自身を含む): 26157600

約数和(自身を除く): 5659085

約数列:

[1, 5, 17, 85, 349, 691, 1745, 3455, 5933, 11747, 29665, 58735, 241159, 1205795, 4099703, 20498515]

約数ペア:

[(1, 20498515), (5, 4099703), (17, 1205795), (85, 241159), (349, 58735), (691, 29665), (1745, 11747), (3455, 5933)]