21578155

素因数分解:

$5^1\times {\mathrm{53}}^1\times {\mathrm{107}}^1\times {\mathrm{761}}^1$

素因数の和:926

約数の個数: 16

約数和(自身を含む): 26663904

約数和(自身を除く): 5085749

約数列:

[1, 5, 53, 107, 265, 535, 761, 3805, 5671, 28355, 40333, 81427, 201665, 407135, 4315631, 21578155]

約数ペア:

[(1, 21578155), (5, 4315631), (53, 407135), (107, 201665), (265, 81427), (535, 40333), (761, 28355), (3805, 5671)]