20211884

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{137}}^1\times {\mathrm{479}}^1$

素因数の和:638

約数の個数: 48

約数和(自身を含む): 44513280

約数和(自身を除く): 24301396

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 77, 137, 154, 274, 308, 479, 548, 958, 959, 1507, 1916, 1918, 3014, 3353, 3836, 5269, 6028, 6706, 10538, 10549, 13412, 21076, 21098, 36883, 42196, 65623, 73766, 131246, 147532, 262492, 459361, 721853, 918722, 1443706, 1837444, 2887412, 5052971, 10105942, 20211884]

約数ペア:

[(1, 20211884), (2, 10105942), (4, 5052971), (7, 2887412), (11, 1837444), (14, 1443706), (22, 918722), (28, 721853), (44, 459361), (77, 262492), (137, 147532), (154, 131246), (274, 73766), (308, 65623), (479, 42196), (548, 36883), (958, 21098), (959, 21076), (1507, 13412), (1916, 10549), (1918, 10538), (3014, 6706), (3353, 6028), (3836, 5269)]