20697849

素因数分解:

$3^4\times {\mathrm{59}}^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1$

素因数の和:203

約数の個数: 40

約数和(自身を含む): 32408640

約数和(自身を除く): 11710791

約数列:

[1, 3, 9, 27, 59, 61, 71, 81, 177, 183, 213, 531, 549, 639, 1593, 1647, 1917, 3599, 4189, 4331, 4779, 4941, 5751, 10797, 12567, 12993, 32391, 37701, 38979, 97173, 113103, 116937, 255529, 291519, 339309, 350811, 766587, 2299761, 6899283, 20697849]

約数ペア:

[(1, 20697849), (3, 6899283), (9, 2299761), (27, 766587), (59, 350811), (61, 339309), (71, 291519), (81, 255529), (177, 116937), (183, 113103), (213, 97173), (531, 38979), (549, 37701), (639, 32391), (1593, 12993), (1647, 12567), (1917, 10797), (3599, 5751), (4189, 4941), (4331, 4779)]