20997444

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^1\times {\mathrm{281}}^1\times {\mathrm{479}}^1$

素因数の和:780

約数の個数: 48

約数和(自身を含む): 53061120

約数和(自身を除く): 32063676

約数列:

[1, 2, 3, 4, 6, 12, 13, 26, 39, 52, 78, 156, 281, 479, 562, 843, 958, 1124, 1437, 1686, 1916, 2874, 3372, 3653, 5748, 6227, 7306, 10959, 12454, 14612, 18681, 21918, 24908, 37362, 43836, 74724, 134599, 269198, 403797, 538396, 807594, 1615188, 1749787, 3499574, 5249361, 6999148, 10498722, 20997444]

約数ペア:

[(1, 20997444), (2, 10498722), (3, 6999148), (4, 5249361), (6, 3499574), (12, 1749787), (13, 1615188), (26, 807594), (39, 538396), (52, 403797), (78, 269198), (156, 134599), (281, 74724), (479, 43836), (562, 37362), (843, 24908), (958, 21918), (1124, 18681), (1437, 14612), (1686, 12454), (1916, 10959), (2874, 7306), (3372, 6227), (3653, 5748)]