21339178

素因数分解:

$2^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{28759}}^1$

素因数の和:28821

約数の個数: 16

約数和(自身を含む): 37272960

約数和(自身を除く): 15933782

約数列:

[1, 2, 7, 14, 53, 106, 371, 742, 28759, 57518, 201313, 402626, 1524227, 3048454, 10669589, 21339178]

約数ペア:

[(1, 21339178), (2, 10669589), (7, 3048454), (14, 1524227), (53, 402626), (106, 201313), (371, 57518), (742, 28759)]