21004221

素因数分解:

$3^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{43487}}^1$

素因数の和:43520

約数の個数: 16

約数和(自身を含む): 33398784

約数和(自身を除く): 12394563

約数列:

[1, 3, 7, 21, 23, 69, 161, 483, 43487, 130461, 304409, 913227, 1000201, 3000603, 7001407, 21004221]

約数ペア:

[(1, 21004221), (3, 7001407), (7, 3000603), (21, 1000201), (23, 913227), (69, 304409), (161, 130461), (483, 43487)]