18719019

素因数分解:

$3^5\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{149}}^1$

素因数の和:222

約数の個数: 48

約数和(自身を含む): 31449600

約数和(自身を除く): 12730581

約数列:

[1, 3, 9, 11, 27, 33, 47, 81, 99, 141, 149, 243, 297, 423, 447, 517, 891, 1269, 1341, 1551, 1639, 2673, 3807, 4023, 4653, 4917, 7003, 11421, 12069, 13959, 14751, 21009, 36207, 41877, 44253, 63027, 77033, 125631, 132759, 189081, 231099, 398277, 567243, 693297, 1701729, 2079891, 6239673, 18719019]

約数ペア:

[(1, 18719019), (3, 6239673), (9, 2079891), (11, 1701729), (27, 693297), (33, 567243), (47, 398277), (81, 231099), (99, 189081), (141, 132759), (149, 125631), (243, 77033), (297, 63027), (423, 44253), (447, 41877), (517, 36207), (891, 21009), (1269, 14751), (1341, 13959), (1551, 12069), (1639, 11421), (2673, 7003), (3807, 4917), (4023, 4653)]