21621771

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{1559}}^1$

素因数の和:1655

約数の個数: 24

約数和(自身を含む): 33096960

約数和(自身を除く): 11475189

約数列:

[1, 3, 9, 23, 67, 69, 201, 207, 603, 1541, 1559, 4623, 4677, 13869, 14031, 35857, 104453, 107571, 313359, 322713, 940077, 2402419, 7207257, 21621771]

約数ペア:

[(1, 21621771), (3, 7207257), (9, 2402419), (23, 940077), (67, 322713), (69, 313359), (201, 107571), (207, 104453), (603, 35857), (1541, 14031), (1559, 13869), (4623, 4677)]