21000657657

素因数分解:

$3^1\times 7^1\times {\mathrm{199}}^1\times {\mathrm{307}}^1\times {\mathrm{16369}}^1$

素因数の和:16885

約数の個数: 32

約数和(自身を含む): 32268544000

約数和(自身を除く): 11267886343

約数列:

[1, 3, 7, 21, 199, 307, 597, 921, 1393, 2149, 4179, 6447, 16369, 49107, 61093, 114583, 183279, 343749, 427651, 1282953, 3257431, 5025283, 9772293, 15075849, 22802017, 35176981, 68406051, 105530943, 1000031317, 3000093951, 7000219219, 21000657657]

約数ペア:

[(1, 21000657657), (3, 7000219219), (7, 3000093951), (21, 1000031317), (199, 105530943), (307, 68406051), (597, 35176981), (921, 22802017), (1393, 15075849), (2149, 9772293), (4179, 5025283), (6447, 3257431), (16369, 1282953), (49107, 427651), (61093, 343749), (114583, 183279)]