678215997

素因数分解:

$3^4\times {\mathrm{431}}^1\times {\mathrm{19427}}^1$

素因数の和:19870

約数の個数: 20

約数和(自身を含む): 1015540416

約数和(自身を除く): 337324419

約数列:

[1, 3, 9, 27, 81, 431, 1293, 3879, 11637, 19427, 34911, 58281, 174843, 524529, 1573587, 8373037, 25119111, 75357333, 226071999, 678215997]

約数ペア:

[(1, 678215997), (3, 226071999), (9, 75357333), (27, 25119111), (81, 8373037), (431, 1573587), (1293, 524529), (3879, 174843), (11637, 58281), (19427, 34911)]