21187209

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{4583}}^1$

素因数の和:4676

約数の個数: 16

約数和(自身を含む): 29924352

約数和(自身を除く): 8737143

約数列:

[1, 3, 23, 67, 69, 201, 1541, 4583, 4623, 13749, 105409, 307061, 316227, 921183, 7062403, 21187209]

約数ペア:

[(1, 21187209), (3, 7062403), (23, 921183), (67, 316227), (69, 307061), (201, 105409), (1541, 13749), (4583, 4623)]