20378967

素因数分解:

$3^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{109}}^1\times {\mathrm{307}}^1$

素因数の和:455

約数の個数: 32

約数和(自身を含む): 32524800

約数和(自身を除く): 12145833

約数列:

[1, 3, 7, 21, 29, 87, 109, 203, 307, 327, 609, 763, 921, 2149, 2289, 3161, 6447, 8903, 9483, 22127, 26709, 33463, 62321, 66381, 100389, 186963, 234241, 702723, 970427, 2911281, 6792989, 20378967]

約数ペア:

[(1, 20378967), (3, 6792989), (7, 2911281), (21, 970427), (29, 702723), (87, 234241), (109, 186963), (203, 100389), (307, 66381), (327, 62321), (609, 33463), (763, 26709), (921, 22127), (2149, 9483), (2289, 8903), (3161, 6447)]