78897987

素因数分解:

$3^2\times 7^2\times {\mathrm{178907}}^1$

素因数の和:178927

約数の個数: 18

約数和(自身を含む): 132570828

約数和(自身を除く): 53672841

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 178907, 536721, 1252349, 1610163, 3757047, 8766443, 11271141, 26299329, 78897987]

約数ペア:

[(1, 78897987), (3, 26299329), (7, 11271141), (9, 8766443), (21, 3757047), (49, 1610163), (63, 1252349), (147, 536721), (441, 178907)]