21304785

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{1669}}^1$

素因数の和:1737

約数の個数: 32

約数和(自身を含む): 36552960

約数和(自身を除く): 15248175

約数列:

[1, 3, 5, 15, 23, 37, 69, 111, 115, 185, 345, 555, 851, 1669, 2553, 4255, 5007, 8345, 12765, 25035, 38387, 61753, 115161, 185259, 191935, 308765, 575805, 926295, 1420319, 4260957, 7101595, 21304785]

約数ペア:

[(1, 21304785), (3, 7101595), (5, 4260957), (15, 1420319), (23, 926295), (37, 575805), (69, 308765), (111, 191935), (115, 185259), (185, 115161), (345, 61753), (555, 38387), (851, 25035), (1669, 12765), (2553, 8345), (4255, 5007)]