21401913

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{127}}^1\times {\mathrm{149}}^1$

素因数の和:321

約数の個数: 32

約数和(自身を含む): 32256000

約数和(自身を除く): 10854087

約数列:

[1, 3, 13, 29, 39, 87, 127, 149, 377, 381, 447, 1131, 1651, 1937, 3683, 4321, 4953, 5811, 11049, 12963, 18923, 47879, 56173, 56769, 143637, 168519, 245999, 548767, 737997, 1646301, 7133971, 21401913]

約数ペア:

[(1, 21401913), (3, 7133971), (13, 1646301), (29, 737997), (39, 548767), (87, 245999), (127, 168519), (149, 143637), (377, 56769), (381, 56173), (447, 47879), (1131, 18923), (1651, 12963), (1937, 11049), (3683, 5811), (4321, 4953)]