21409505

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{227}}^1\times {\mathrm{1451}}^1$

素因数の和:1696

約数の個数: 16

約数和(自身を含む): 27808704

約数和(自身を除く): 6399199

約数列:

[1, 5, 13, 65, 227, 1135, 1451, 2951, 7255, 14755, 18863, 94315, 329377, 1646885, 4281901, 21409505]

約数ペア:

[(1, 21409505), (5, 4281901), (13, 1646885), (65, 329377), (227, 94315), (1135, 18863), (1451, 14755), (2951, 7255)]