21255260

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{2819}}^1$

素因数の和:2870

約数の個数: 48

約数和(自身を含む): 49744800

約数和(自身を除く): 28489540

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 29, 52, 58, 65, 116, 130, 145, 260, 290, 377, 580, 754, 1508, 1885, 2819, 3770, 5638, 7540, 11276, 14095, 28190, 36647, 56380, 73294, 81751, 146588, 163502, 183235, 327004, 366470, 408755, 732940, 817510, 1062763, 1635020, 2125526, 4251052, 5313815, 10627630, 21255260]

約数ペア:

[(1, 21255260), (2, 10627630), (4, 5313815), (5, 4251052), (10, 2125526), (13, 1635020), (20, 1062763), (26, 817510), (29, 732940), (52, 408755), (58, 366470), (65, 327004), (116, 183235), (130, 163502), (145, 146588), (260, 81751), (290, 73294), (377, 56380), (580, 36647), (754, 28190), (1508, 14095), (1885, 11276), (2819, 7540), (3770, 5638)]