21315441

素因数分解:

$3^1\times 7^2\times {\mathrm{37}}^1\times {\mathrm{3919}}^1$

素因数の和:3973

約数の個数: 24

約数和(自身を含む): 33962880

約数和(自身を除く): 12647439

約数列:

[1, 3, 7, 21, 37, 49, 111, 147, 259, 777, 1813, 3919, 5439, 11757, 27433, 82299, 145003, 192031, 435009, 576093, 1015021, 3045063, 7105147, 21315441]

約数ペア:

[(1, 21315441), (3, 7105147), (7, 3045063), (21, 1015021), (37, 576093), (49, 435009), (111, 192031), (147, 145003), (259, 82299), (777, 27433), (1813, 11757), (3919, 5439)]