19747791

素因数分解:

$3^2\times 7^1\times {\mathrm{331}}^1\times {\mathrm{947}}^1$

素因数の和:1291

約数の個数: 24

約数和(自身を含む): 32732544

約数和(自身を除く): 12984753

約数列:

[1, 3, 7, 9, 21, 63, 331, 947, 993, 2317, 2841, 2979, 6629, 6951, 8523, 19887, 20853, 59661, 313457, 940371, 2194199, 2821113, 6582597, 19747791]

約数ペア:

[(1, 19747791), (3, 6582597), (7, 2821113), (9, 2194199), (21, 940371), (63, 313457), (331, 59661), (947, 20853), (993, 19887), (2317, 8523), (2841, 6951), (2979, 6629)]