21270712

素因数分解:

$2^3\times {\mathrm{31}}^1\times {\mathrm{199}}^1\times {\mathrm{431}}^1$

素因数の和:667

約数の個数: 32

約数和(自身を含む): 41472000

約数和(自身を除く): 20201288

約数列:

[1, 2, 4, 8, 31, 62, 124, 199, 248, 398, 431, 796, 862, 1592, 1724, 3448, 6169, 12338, 13361, 24676, 26722, 49352, 53444, 85769, 106888, 171538, 343076, 686152, 2658839, 5317678, 10635356, 21270712]

約数ペア:

[(1, 21270712), (2, 10635356), (4, 5317678), (8, 2658839), (31, 686152), (62, 343076), (124, 171538), (199, 106888), (248, 85769), (398, 53444), (431, 49352), (796, 26722), (862, 24676), (1592, 13361), (1724, 12338), (3448, 6169)]