21455721

素因数分解:

$3^2\times 7^1\times {\mathrm{97}}^1\times {\mathrm{3511}}^1$

素因数の和:3621

約数の個数: 24

約数和(自身を含む): 35794304

約数和(自身を除く): 14338583

約数列:

[1, 3, 7, 9, 21, 63, 97, 291, 679, 873, 2037, 3511, 6111, 10533, 24577, 31599, 73731, 221193, 340567, 1021701, 2383969, 3065103, 7151907, 21455721]

約数ペア:

[(1, 21455721), (3, 7151907), (7, 3065103), (9, 2383969), (21, 1021701), (63, 340567), (97, 221193), (291, 73731), (679, 31599), (873, 24577), (2037, 10533), (3511, 6111)]