20805327.000000000

素因数分解:

$2^4\times 3^2\times 7^2\times {\mathrm{28387}}^1$

素因数の和:28415

約数の個数: 90

約数和(自身を含む): 652100748

約数和(自身を除く): 451802076

約数列:

[1, 2, 3, 4, 6, 7, 8, 9, 12, 14, 16, 18, 21, 24, 28, 36, 42, 48, 49, 56, 63, 72, 84, 98, 112, 126, 144, 147, 168, 196, 252, 294, 336, 392, 441, 504, 588, 784, 882, 1008, 1176, 1764, 2352, 3528, 7056, 28387, 56774, 85161, 113548, 170322, 198709, 227096, 255483, 340644, 397418, 454192, 510966, 596127, 681288, 794836, 1021932, 1192254, 1362576, 1390963, 1589672, 1788381, 2043864, 2384508, 2781926, 3179344, 3576762, 4087728, 4172889, 4769016, 5563852, 7153524, 8345778, 9538032, 11127704, 12518667, 14307048, 16691556, 22255408, 25037334, 28614096, 33383112, 50074668, 66766224, 100149336, 200298672]

約数ペア:

[(1, 200298672), (2, 100149336), (3, 66766224), (4, 50074668), (6, 33383112), (7, 28614096), (8, 25037334), (9, 22255408), (12, 16691556), (14, 14307048), (16, 12518667), (18, 11127704), (21, 9538032), (24, 8345778), (28, 7153524), (36, 5563852), (42, 4769016), (48, 4172889), (49, 4087728), (56, 3576762), (63, 3179344), (72, 2781926), (84, 2384508), (98, 2043864), (112, 1788381), (126, 1589672), (144, 1390963), (147, 1362576), (168, 1192254), (196, 1021932), (252, 794836), (294, 681288), (336, 596127), (392, 510966), (441, 454192), (504, 397418), (588, 340644), (784, 255483), (882, 227096), (1008, 198709), (1176, 170322), (1764, 113548), (2352, 85161), (3528, 56774), (7056, 28387)]