20981865

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{997}}^1$

素因数の和:1089

約数の個数: 32

約数和(自身を含む): 35640576

約数和(自身を除く): 14658711

約数列:

[1, 3, 5, 15, 23, 61, 69, 115, 183, 305, 345, 915, 997, 1403, 2991, 4209, 4985, 7015, 14955, 21045, 22931, 60817, 68793, 114655, 182451, 304085, 343965, 912255, 1398791, 4196373, 6993955, 20981865]

約数ペア:

[(1, 20981865), (3, 6993955), (5, 4196373), (15, 1398791), (23, 912255), (61, 343965), (69, 304085), (115, 182451), (183, 114655), (305, 68793), (345, 60817), (915, 22931), (997, 21045), (1403, 14955), (2991, 7015), (4209, 4985)]