78387640

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{97}}^1\times {\mathrm{227}}^1$

素因数の和:424

約数の個数: 64

約数和(自身を含む): 180986400

約数和(自身を除く): 102598760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 97, 178, 194, 227, 356, 388, 445, 454, 485, 712, 776, 890, 908, 970, 1135, 1780, 1816, 1940, 2270, 3560, 3880, 4540, 8633, 9080, 17266, 20203, 22019, 34532, 40406, 43165, 44038, 69064, 80812, 86330, 88076, 101015, 110095, 161624, 172660, 176152, 202030, 220190, 345320, 404060, 440380, 808120, 880760, 1959691, 3919382, 7838764, 9798455, 15677528, 19596910, 39193820, 78387640]

約数ペア:

[(1, 78387640), (2, 39193820), (4, 19596910), (5, 15677528), (8, 9798455), (10, 7838764), (20, 3919382), (40, 1959691), (89, 880760), (97, 808120), (178, 440380), (194, 404060), (227, 345320), (356, 220190), (388, 202030), (445, 176152), (454, 172660), (485, 161624), (712, 110095), (776, 101015), (890, 88076), (908, 86330), (970, 80812), (1135, 69064), (1780, 44038), (1816, 43165), (1940, 40406), (2270, 34532), (3560, 22019), (3880, 20203), (4540, 17266), (8633, 9080)]