21789190

素因数分解:

$2^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{30689}}^1$

素因数の和:30767

約数の個数: 16

約数和(自身を含む): 39774240

約数和(自身を除く): 17985050

約数列:

[1, 2, 5, 10, 71, 142, 355, 710, 30689, 61378, 153445, 306890, 2178919, 4357838, 10894595, 21789190]

約数ペア:

[(1, 21789190), (2, 10894595), (5, 4357838), (10, 2178919), (71, 306890), (142, 153445), (355, 61378), (710, 30689)]