21472785

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{28069}}^1$

素因数の和:28097

約数の個数: 24

約数和(自身を含む): 39410280

約数和(自身を除く): 17937495

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 153, 255, 765, 28069, 84207, 140345, 252621, 421035, 477173, 1263105, 1431519, 2385865, 4294557, 7157595, 21472785]

約数ペア:

[(1, 21472785), (3, 7157595), (5, 4294557), (9, 2385865), (15, 1431519), (17, 1263105), (45, 477173), (51, 421035), (85, 252621), (153, 140345), (255, 84207), (765, 28069)]