20825805

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1$

素因数の和:131

約数の個数: 128

約数和(自身を含む): 47738880

約数和(自身を除く): 26913075

約数列:

[1, 3, 5, 7, 11, 13, 15, 19, 21, 33, 35, 39, 55, 57, 65, 73, 77, 91, 95, 105, 133, 143, 165, 195, 209, 219, 231, 247, 273, 285, 365, 385, 399, 429, 455, 511, 627, 665, 715, 741, 803, 949, 1001, 1045, 1095, 1155, 1235, 1365, 1387, 1463, 1533, 1729, 1995, 2145, 2409, 2555, 2717, 2847, 3003, 3135, 3705, 4015, 4161, 4389, 4745, 5005, 5187, 5621, 6643, 6935, 7315, 7665, 8151, 8645, 9709, 10439, 12045, 13585, 14235, 15015, 15257, 16863, 18031, 19019, 19929, 20805, 21945, 25935, 28105, 29127, 31317, 33215, 40755, 45771, 48545, 52195, 54093, 57057, 73073, 76285, 84315, 90155, 95095, 99645, 106799, 126217, 145635, 156585, 198341, 219219, 228855, 270465, 285285, 320397, 365365, 378651, 533995, 595023, 631085, 991705, 1096095, 1388387, 1601985, 1893255, 2975115, 4165161, 6941935, 20825805]

約数ペア:

[(1, 20825805), (3, 6941935), (5, 4165161), (7, 2975115), (11, 1893255), (13, 1601985), (15, 1388387), (19, 1096095), (21, 991705), (33, 631085), (35, 595023), (39, 533995), (55, 378651), (57, 365365), (65, 320397), (73, 285285), (77, 270465), (91, 228855), (95, 219219), (105, 198341), (133, 156585), (143, 145635), (165, 126217), (195, 106799), (209, 99645), (219, 95095), (231, 90155), (247, 84315), (273, 76285), (285, 73073), (365, 57057), (385, 54093), (399, 52195), (429, 48545), (455, 45771), (511, 40755), (627, 33215), (665, 31317), (715, 29127), (741, 28105), (803, 25935), (949, 21945), (1001, 20805), (1045, 19929), (1095, 19019), (1155, 18031), (1235, 16863), (1365, 15257), (1387, 15015), (1463, 14235), (1533, 13585), (1729, 12045), (1995, 10439), (2145, 9709), (2409, 8645), (2555, 8151), (2717, 7665), (2847, 7315), (3003, 6935), (3135, 6643), (3705, 5621), (4015, 5187), (4161, 5005), (4389, 4745)]