21890337

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{83}}^1\times {\mathrm{661}}^1$

素因数の和:773

約数の個数: 32

約数和(自身を含む): 35589120

約数和(自身を除く): 13698783

約数列:

[1, 3, 7, 19, 21, 57, 83, 133, 249, 399, 581, 661, 1577, 1743, 1983, 4627, 4731, 11039, 12559, 13881, 33117, 37677, 54863, 87913, 164589, 263739, 384041, 1042397, 1152123, 3127191, 7296779, 21890337]

約数ペア:

[(1, 21890337), (3, 7296779), (7, 3127191), (19, 1152123), (21, 1042397), (57, 384041), (83, 263739), (133, 164589), (249, 87913), (399, 54863), (581, 37677), (661, 33117), (1577, 13881), (1743, 12559), (1983, 11039), (4627, 4731)]