21520035

素因数分解:

$3^2\times 5^1\times {\mathrm{73}}^1\times {\mathrm{6551}}^1$

素因数の和:6635

約数の個数: 24

約数和(自身を含む): 37818144

約数和(自身を除く): 16298109

約数列:

[1, 3, 5, 9, 15, 45, 73, 219, 365, 657, 1095, 3285, 6551, 19653, 32755, 58959, 98265, 294795, 478223, 1434669, 2391115, 4304007, 7173345, 21520035]

約数ペア:

[(1, 21520035), (3, 7173345), (5, 4304007), (9, 2391115), (15, 1434669), (45, 478223), (73, 294795), (219, 98265), (365, 58959), (657, 32755), (1095, 19653), (3285, 6551)]