21225890

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{353}}^1\times {\mathrm{859}}^1$

素因数の和:1226

約数の個数: 32

約数和(自身を含む): 43839360

約数和(自身を除く): 22613470

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 353, 706, 859, 1718, 1765, 2471, 3530, 4295, 4942, 6013, 8590, 12026, 12355, 24710, 30065, 60130, 303227, 606454, 1516135, 2122589, 3032270, 4245178, 10612945, 21225890]

約数ペア:

[(1, 21225890), (2, 10612945), (5, 4245178), (7, 3032270), (10, 2122589), (14, 1516135), (35, 606454), (70, 303227), (353, 60130), (706, 30065), (859, 24710), (1718, 12355), (1765, 12026), (2471, 8590), (3530, 6013), (4295, 4942)]