20005315

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1\times {\mathrm{109}}^1$

素因数の和:243

約数の個数: 32

約数和(自身を含む): 27371520

約数和(自身を除く): 7366205

約数列:

[1, 5, 11, 47, 55, 71, 109, 235, 355, 517, 545, 781, 1199, 2585, 3337, 3905, 5123, 5995, 7739, 16685, 25615, 36707, 38695, 56353, 85129, 183535, 281765, 363733, 425645, 1818665, 4001063, 20005315]

約数ペア:

[(1, 20005315), (5, 4001063), (11, 1818665), (47, 425645), (55, 363733), (71, 281765), (109, 183535), (235, 85129), (355, 56353), (517, 38695), (545, 36707), (781, 25615), (1199, 16685), (2585, 7739), (3337, 5995), (3905, 5123)]