21978805

素因数分解:

$5^1\times {\mathrm{43}}^1\times {\mathrm{151}}^1\times {\mathrm{677}}^1$

素因数の和:876

約数の個数: 16

約数和(自身を含む): 27206784

約数和(自身を除く): 5227979

約数列:

[1, 5, 43, 151, 215, 677, 755, 3385, 6493, 29111, 32465, 102227, 145555, 511135, 4395761, 21978805]

約数ペア:

[(1, 21978805), (5, 4395761), (43, 511135), (151, 145555), (215, 102227), (677, 32465), (755, 29111), (3385, 6493)]