21456785

素因数分解:

$5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{269}}^1$

素因数の和:377

約数の個数: 32

約数和(自身を含む): 30792960

約数和(自身を除く): 9336175

約数列:

[1, 5, 7, 35, 43, 53, 215, 265, 269, 301, 371, 1345, 1505, 1855, 1883, 2279, 9415, 11395, 11567, 14257, 15953, 57835, 71285, 79765, 80969, 99799, 404845, 498995, 613051, 3065255, 4291357, 21456785]

約数ペア:

[(1, 21456785), (5, 4291357), (7, 3065255), (35, 613051), (43, 498995), (53, 404845), (215, 99799), (265, 80969), (269, 79765), (301, 71285), (371, 57835), (1345, 15953), (1505, 14257), (1855, 11567), (1883, 11395), (2279, 9415)]