21088207

素因数分解:

$7^1\times {\mathrm{71}}^1\times {\mathrm{151}}^1\times {\mathrm{281}}^1$

素因数の和:510

約数の個数: 16

約数和(自身を含む): 24689664

約数和(自身を除く): 3601457

約数列:

[1, 7, 71, 151, 281, 497, 1057, 1967, 10721, 19951, 42431, 75047, 139657, 297017, 3012601, 21088207]

約数ペア:

[(1, 21088207), (7, 3012601), (71, 297017), (151, 139657), (281, 75047), (497, 42431), (1057, 19951), (1967, 10721)]