21087255

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{4273}}^1$

素因数の和:4335

約数の個数: 32

約数和(自身を含む): 39389184

約数和(自身を除く): 18301929

約数列:

[1, 3, 5, 7, 15, 21, 35, 47, 105, 141, 235, 329, 705, 987, 1645, 4273, 4935, 12819, 21365, 29911, 64095, 89733, 149555, 200831, 448665, 602493, 1004155, 1405817, 3012465, 4217451, 7029085, 21087255]

約数ペア:

[(1, 21087255), (3, 7029085), (5, 4217451), (7, 3012465), (15, 1405817), (21, 1004155), (35, 602493), (47, 448665), (105, 200831), (141, 149555), (235, 89733), (329, 64095), (705, 29911), (987, 21365), (1645, 12819), (4273, 4935)]