21279810

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{1009}}^1$

素因数の和:1075

約数の個数: 64

約数和(自身を含む): 55267200

約数和(自身を除く): 33987390

約数列:

[1, 2, 3, 5, 6, 10, 15, 19, 30, 37, 38, 57, 74, 95, 111, 114, 185, 190, 222, 285, 370, 555, 570, 703, 1009, 1110, 1406, 2018, 2109, 3027, 3515, 4218, 5045, 6054, 7030, 10090, 10545, 15135, 19171, 21090, 30270, 37333, 38342, 57513, 74666, 95855, 111999, 115026, 186665, 191710, 223998, 287565, 373330, 559995, 575130, 709327, 1119990, 1418654, 2127981, 3546635, 4255962, 7093270, 10639905, 21279810]

約数ペア:

[(1, 21279810), (2, 10639905), (3, 7093270), (5, 4255962), (6, 3546635), (10, 2127981), (15, 1418654), (19, 1119990), (30, 709327), (37, 575130), (38, 559995), (57, 373330), (74, 287565), (95, 223998), (111, 191710), (114, 186665), (185, 115026), (190, 111999), (222, 95855), (285, 74666), (370, 57513), (555, 38342), (570, 37333), (703, 30270), (1009, 21090), (1110, 19171), (1406, 15135), (2018, 10545), (2109, 10090), (3027, 7030), (3515, 6054), (4218, 5045)]