21209535

素因数分解:

$3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{97}}^1\times {\mathrm{113}}^1$

素因数の和:264

約数の個数: 48

約数和(自身を含む): 38342304

約数和(自身を除く): 17132769

約数列:

[1, 3, 5, 9, 15, 43, 45, 97, 113, 129, 215, 291, 339, 387, 485, 565, 645, 873, 1017, 1455, 1695, 1935, 4171, 4365, 4859, 5085, 10961, 12513, 14577, 20855, 24295, 32883, 37539, 43731, 54805, 62565, 72885, 98649, 164415, 187695, 218655, 471323, 493245, 1413969, 2356615, 4241907, 7069845, 21209535]

約数ペア:

[(1, 21209535), (3, 7069845), (5, 4241907), (9, 2356615), (15, 1413969), (43, 493245), (45, 471323), (97, 218655), (113, 187695), (129, 164415), (215, 98649), (291, 72885), (339, 62565), (387, 54805), (485, 43731), (565, 37539), (645, 32883), (873, 24295), (1017, 20855), (1455, 14577), (1695, 12513), (1935, 10961), (4171, 5085), (4365, 4859)]