20289815

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{2347}}^1$

素因数の和:2391

約数の個数: 32

約数和(自身を含む): 31557120

約数和(自身を除く): 11267305

約数列:

[1, 5, 7, 13, 19, 35, 65, 91, 95, 133, 247, 455, 665, 1235, 1729, 2347, 8645, 11735, 16429, 30511, 44593, 82145, 152555, 213577, 222965, 312151, 579709, 1067885, 1560755, 2898545, 4057963, 20289815]

約数ペア:

[(1, 20289815), (5, 4057963), (7, 2898545), (13, 1560755), (19, 1067885), (35, 579709), (65, 312151), (91, 222965), (95, 213577), (133, 152555), (247, 82145), (455, 44593), (665, 30511), (1235, 16429), (1729, 11735), (2347, 8645)]