20919423

素因数分解:

$3^1\times 7^2\times {\mathrm{101}}^1\times {\mathrm{1409}}^1$

素因数の和:1527

約数の個数: 24

約数和(自身を含む): 32790960

約数和(自身を除く): 11871537

約数列:

[1, 3, 7, 21, 49, 101, 147, 303, 707, 1409, 2121, 4227, 4949, 9863, 14847, 29589, 69041, 142309, 207123, 426927, 996163, 2988489, 6973141, 20919423]

約数ペア:

[(1, 20919423), (3, 6973141), (7, 2988489), (21, 996163), (49, 426927), (101, 207123), (147, 142309), (303, 69041), (707, 29589), (1409, 14847), (2121, 9863), (4227, 4949)]