21109893

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{191}}^1\times {\mathrm{277}}^1$

素因数の和:497

約数の個数: 32

約数和(自身を含む): 34160640

約数和(自身を除く): 13050747

約数列:

[1, 3, 7, 19, 21, 57, 133, 191, 277, 399, 573, 831, 1337, 1939, 3629, 4011, 5263, 5817, 10887, 15789, 25403, 36841, 52907, 76209, 110523, 158721, 370349, 1005233, 1111047, 3015699, 7036631, 21109893]

約数ペア:

[(1, 21109893), (3, 7036631), (7, 3015699), (19, 1111047), (21, 1005233), (57, 370349), (133, 158721), (191, 110523), (277, 76209), (399, 52907), (573, 36841), (831, 25403), (1337, 15789), (1939, 10887), (3629, 5817), (4011, 5263)]