21258028

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{7211}}^1$

素因数の和:7293

約数の個数: 24

約数和(自身を含む): 41194944

約数和(自身を除く): 19936916

約数列:

[1, 2, 4, 11, 22, 44, 67, 134, 268, 737, 1474, 2948, 7211, 14422, 28844, 79321, 158642, 317284, 483137, 966274, 1932548, 5314507, 10629014, 21258028]

約数ペア:

[(1, 21258028), (2, 10629014), (4, 5314507), (11, 1932548), (22, 966274), (44, 483137), (67, 317284), (134, 158642), (268, 79321), (737, 28844), (1474, 14422), (2948, 7211)]