21007855

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{16607}}^1$

素因数の和:16646

約数の個数: 16

約数和(自身を含む): 28698624

約数和(自身を除く): 7690769

約数列:

[1, 5, 11, 23, 55, 115, 253, 1265, 16607, 83035, 182677, 381961, 913385, 1909805, 4201571, 21007855]

約数ペア:

[(1, 21007855), (5, 4201571), (11, 1909805), (23, 913385), (55, 381961), (115, 182677), (253, 83035), (1265, 16607)]