19812681

素因数分解:

$3^4\times 7^1\times {\mathrm{83}}^1\times {\mathrm{421}}^1$

素因数の和:523

約数の個数: 40

約数和(自身を含む): 34313664

約数和(自身を除く): 14500983

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 83, 189, 249, 421, 567, 581, 747, 1263, 1743, 2241, 2947, 3789, 5229, 6723, 8841, 11367, 15687, 26523, 34101, 34943, 47061, 79569, 104829, 238707, 244601, 314487, 733803, 943461, 2201409, 2830383, 6604227, 19812681]

約数ペア:

[(1, 19812681), (3, 6604227), (7, 2830383), (9, 2201409), (21, 943461), (27, 733803), (63, 314487), (81, 244601), (83, 238707), (189, 104829), (249, 79569), (421, 47061), (567, 34943), (581, 34101), (747, 26523), (1263, 15687), (1743, 11367), (2241, 8841), (2947, 6723), (3789, 5229)]