21139628

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{349}}^1\times {\mathrm{797}}^1$

素因数の和:1169

約数の個数: 24

約数和(自身を含む): 39102000

約数和(自身を除く): 17962372

約数列:

[1, 2, 4, 19, 38, 76, 349, 698, 797, 1396, 1594, 3188, 6631, 13262, 15143, 26524, 30286, 60572, 278153, 556306, 1112612, 5284907, 10569814, 21139628]

約数ペア:

[(1, 21139628), (2, 10569814), (4, 5284907), (19, 1112612), (38, 556306), (76, 278153), (349, 60572), (698, 30286), (797, 26524), (1396, 15143), (1594, 13262), (3188, 6631)]