20181231

素因数分解:

$3^4\times 7^1\times {\mathrm{35593}}^1$

素因数の和:35612

約数の個数: 20

約数和(自身を含む): 34454992

約数和(自身を除く): 14273761

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 35593, 106779, 249151, 320337, 747453, 961011, 2242359, 2883033, 6727077, 20181231]

約数ペア:

[(1, 20181231), (3, 6727077), (7, 2883033), (9, 2242359), (21, 961011), (27, 747453), (63, 320337), (81, 249151), (189, 106779), (567, 35593)]