21717255

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{107}}^1\times {\mathrm{1933}}^1$

素因数の和:2055

約数の個数: 32

約数和(自身を含む): 40103424

約数和(自身を除く): 18386169

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 107, 321, 535, 749, 1605, 1933, 2247, 3745, 5799, 9665, 11235, 13531, 28995, 40593, 67655, 202965, 206831, 620493, 1034155, 1447817, 3102465, 4343451, 7239085, 21717255]

約数ペア:

[(1, 21717255), (3, 7239085), (5, 4343451), (7, 3102465), (15, 1447817), (21, 1034155), (35, 620493), (105, 206831), (107, 202965), (321, 67655), (535, 40593), (749, 28995), (1605, 13531), (1933, 11235), (2247, 9665), (3745, 5799)]