20247780

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{71}}^1\times {\mathrm{97}}^1$

素因数の和:194

約数の個数: 144

約数和(自身を含む): 67568256

約数和(自身を除く): 47320476

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 60, 70, 71, 84, 97, 98, 105, 140, 142, 147, 194, 196, 210, 213, 245, 284, 291, 294, 355, 388, 420, 426, 485, 490, 497, 582, 588, 679, 710, 735, 852, 970, 980, 994, 1065, 1164, 1358, 1420, 1455, 1470, 1491, 1940, 1988, 2037, 2130, 2485, 2716, 2910, 2940, 2982, 3395, 3479, 4074, 4260, 4753, 4970, 5820, 5964, 6790, 6887, 6958, 7455, 8148, 9506, 9940, 10185, 10437, 13580, 13774, 13916, 14259, 14910, 17395, 19012, 20370, 20661, 20874, 23765, 27548, 28518, 29820, 34435, 34790, 40740, 41322, 41748, 47530, 48209, 52185, 57036, 68870, 69580, 71295, 82644, 95060, 96418, 103305, 104370, 137740, 142590, 144627, 192836, 206610, 208740, 241045, 285180, 289254, 337463, 413220, 482090, 578508, 674926, 723135, 964180, 1012389, 1349852, 1446270, 1687315, 2024778, 2892540, 3374630, 4049556, 5061945, 6749260, 10123890, 20247780]

約数ペア:

[(1, 20247780), (2, 10123890), (3, 6749260), (4, 5061945), (5, 4049556), (6, 3374630), (7, 2892540), (10, 2024778), (12, 1687315), (14, 1446270), (15, 1349852), (20, 1012389), (21, 964180), (28, 723135), (30, 674926), (35, 578508), (42, 482090), (49, 413220), (60, 337463), (70, 289254), (71, 285180), (84, 241045), (97, 208740), (98, 206610), (105, 192836), (140, 144627), (142, 142590), (147, 137740), (194, 104370), (196, 103305), (210, 96418), (213, 95060), (245, 82644), (284, 71295), (291, 69580), (294, 68870), (355, 57036), (388, 52185), (420, 48209), (426, 47530), (485, 41748), (490, 41322), (497, 40740), (582, 34790), (588, 34435), (679, 29820), (710, 28518), (735, 27548), (852, 23765), (970, 20874), (980, 20661), (994, 20370), (1065, 19012), (1164, 17395), (1358, 14910), (1420, 14259), (1455, 13916), (1470, 13774), (1491, 13580), (1940, 10437), (1988, 10185), (2037, 9940), (2130, 9506), (2485, 8148), (2716, 7455), (2910, 6958), (2940, 6887), (2982, 6790), (3395, 5964), (3479, 5820), (4074, 4970), (4260, 4753)]