21140735

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{1277}}^1$

素因数の和:1343

約数の個数: 32

約数和(自身を含む): 32389632

約数和(自身を除く): 11248897

約数列:

[1, 5, 7, 11, 35, 43, 55, 77, 215, 301, 385, 473, 1277, 1505, 2365, 3311, 6385, 8939, 14047, 16555, 44695, 54911, 70235, 98329, 274555, 384377, 491645, 604021, 1921885, 3020105, 4228147, 21140735]

約数ペア:

[(1, 21140735), (5, 4228147), (7, 3020105), (11, 1921885), (35, 604021), (43, 491645), (55, 384377), (77, 274555), (215, 98329), (301, 70235), (385, 54911), (473, 44695), (1277, 16555), (1505, 14047), (2365, 8939), (3311, 6385)]