21378189

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{32839}}^1$

素因数の和:32880

約数の個数: 16

約数和(自身を含む): 33628160

約数和(自身を除く): 12249971

約数列:

[1, 3, 7, 21, 31, 93, 217, 651, 32839, 98517, 229873, 689619, 1018009, 3054027, 7126063, 21378189]

約数ペア:

[(1, 21378189), (3, 7126063), (7, 3054027), (21, 1018009), (31, 689619), (93, 229873), (217, 98517), (651, 32839)]