21984116

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{137}}^1\times {\mathrm{521}}^1$

素因数の和:680

約数の個数: 48

約数和(自身を含む): 48408192

約数和(自身を除く): 26424076

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 77, 137, 154, 274, 308, 521, 548, 959, 1042, 1507, 1918, 2084, 3014, 3647, 3836, 5731, 6028, 7294, 10549, 11462, 14588, 21098, 22924, 40117, 42196, 71377, 80234, 142754, 160468, 285508, 499639, 785147, 999278, 1570294, 1998556, 3140588, 5496029, 10992058, 21984116]

約数ペア:

[(1, 21984116), (2, 10992058), (4, 5496029), (7, 3140588), (11, 1998556), (14, 1570294), (22, 999278), (28, 785147), (44, 499639), (77, 285508), (137, 160468), (154, 142754), (274, 80234), (308, 71377), (521, 42196), (548, 40117), (959, 22924), (1042, 21098), (1507, 14588), (1918, 11462), (2084, 10549), (3014, 7294), (3647, 6028), (3836, 5731)]