21758751

素因数分解:

$3^2\times 7^1\times {\mathrm{137}}^1\times {\mathrm{2521}}^1$

素因数の和:2671

約数の個数: 24

約数和(自身を含む): 36195744

約数和(自身を除く): 14436993

約数列:

[1, 3, 7, 9, 21, 63, 137, 411, 959, 1233, 2521, 2877, 7563, 8631, 17647, 22689, 52941, 158823, 345377, 1036131, 2417639, 3108393, 7252917, 21758751]

約数ペア:

[(1, 21758751), (3, 7252917), (7, 3108393), (9, 2417639), (21, 1036131), (63, 345377), (137, 158823), (411, 52941), (959, 22689), (1233, 17647), (2521, 8631), (2877, 7563)]