21219880

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{1663}}^1$

素因数の和:1714

約数の個数: 64

約数和(自身を含む): 53913600

約数和(自身を除く): 32693720

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 29, 40, 44, 55, 58, 88, 110, 116, 145, 220, 232, 290, 319, 440, 580, 638, 1160, 1276, 1595, 1663, 2552, 3190, 3326, 6380, 6652, 8315, 12760, 13304, 16630, 18293, 33260, 36586, 48227, 66520, 73172, 91465, 96454, 146344, 182930, 192908, 241135, 365860, 385816, 482270, 530497, 731720, 964540, 1060994, 1929080, 2121988, 2652485, 4243976, 5304970, 10609940, 21219880]

約数ペア:

[(1, 21219880), (2, 10609940), (4, 5304970), (5, 4243976), (8, 2652485), (10, 2121988), (11, 1929080), (20, 1060994), (22, 964540), (29, 731720), (40, 530497), (44, 482270), (55, 385816), (58, 365860), (88, 241135), (110, 192908), (116, 182930), (145, 146344), (220, 96454), (232, 91465), (290, 73172), (319, 66520), (440, 48227), (580, 36586), (638, 33260), (1160, 18293), (1276, 16630), (1595, 13304), (1663, 12760), (2552, 8315), (3190, 6652), (3326, 6380)]