21749785

素因数分解:

$5^1\times {\mathrm{71}}^1\times {\mathrm{197}}^1\times {\mathrm{311}}^1$

素因数の和:584

約数の個数: 16

約数和(自身を含む): 26687232

約数和(自身を除く): 4937447

約数列:

[1, 5, 71, 197, 311, 355, 985, 1555, 13987, 22081, 61267, 69935, 110405, 306335, 4349957, 21749785]

約数ペア:

[(1, 21749785), (5, 4349957), (71, 306335), (197, 110405), (311, 69935), (355, 61267), (985, 22081), (1555, 13987)]