20268105880

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{643}}^1\times {\mathrm{1009}}^1$

素因数の和:1745

約数の個数: 128

約数和(自身を含む): 50578214400

約数和(自身を除く): 30310108520

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 71, 88, 110, 142, 220, 284, 355, 440, 568, 643, 710, 781, 1009, 1286, 1420, 1562, 2018, 2572, 2840, 3124, 3215, 3905, 4036, 5045, 5144, 6248, 6430, 7073, 7810, 8072, 10090, 11099, 12860, 14146, 15620, 20180, 22198, 25720, 28292, 31240, 35365, 40360, 44396, 45653, 55495, 56584, 70730, 71639, 88792, 91306, 110990, 141460, 143278, 182612, 221980, 228265, 282920, 286556, 358195, 365224, 443960, 456530, 502183, 573112, 648787, 716390, 788029, 913060, 1004366, 1297574, 1432780, 1576058, 1826120, 2008732, 2510915, 2595148, 2865560, 3152116, 3243935, 3940145, 4017464, 5021830, 5190296, 6304232, 6487870, 7136657, 7880290, 10043660, 12975740, 14273314, 15760580, 20087320, 25951480, 28546628, 31521160, 35683285, 46063877, 57093256, 71366570, 92127754, 142733140, 184255508, 230319385, 285466280, 368511016, 460638770, 506702647, 921277540, 1013405294, 1842555080, 2026810588, 2533513235, 4053621176, 5067026470, 10134052940, 20268105880]

約数ペア:

[(1, 20268105880), (2, 10134052940), (4, 5067026470), (5, 4053621176), (8, 2533513235), (10, 2026810588), (11, 1842555080), (20, 1013405294), (22, 921277540), (40, 506702647), (44, 460638770), (55, 368511016), (71, 285466280), (88, 230319385), (110, 184255508), (142, 142733140), (220, 92127754), (284, 71366570), (355, 57093256), (440, 46063877), (568, 35683285), (643, 31521160), (710, 28546628), (781, 25951480), (1009, 20087320), (1286, 15760580), (1420, 14273314), (1562, 12975740), (2018, 10043660), (2572, 7880290), (2840, 7136657), (3124, 6487870), (3215, 6304232), (3905, 5190296), (4036, 5021830), (5045, 4017464), (5144, 3940145), (6248, 3243935), (6430, 3152116), (7073, 2865560), (7810, 2595148), (8072, 2510915), (10090, 2008732), (11099, 1826120), (12860, 1576058), (14146, 1432780), (15620, 1297574), (20180, 1004366), (22198, 913060), (25720, 788029), (28292, 716390), (31240, 648787), (35365, 573112), (40360, 502183), (44396, 456530), (45653, 443960), (55495, 365224), (56584, 358195), (70730, 286556), (71639, 282920), (88792, 228265), (91306, 221980), (110990, 182612), (141460, 143278)]