281544440

素因数分解:

$2^3\times 5^1\times {\mathrm{97}}^1\times {\mathrm{149}}^1\times {\mathrm{487}}^1$

素因数の和:744

約数の個数: 64

約数和(自身を含む): 645624000

約数和(自身を除く): 364079560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 97, 149, 194, 298, 388, 485, 487, 596, 745, 776, 970, 974, 1192, 1490, 1940, 1948, 2435, 2980, 3880, 3896, 4870, 5960, 9740, 14453, 19480, 28906, 47239, 57812, 72265, 72563, 94478, 115624, 144530, 145126, 188956, 236195, 289060, 290252, 362815, 377912, 472390, 578120, 580504, 725630, 944780, 1451260, 1889560, 2902520, 7038611, 14077222, 28154444, 35193055, 56308888, 70386110, 140772220, 281544440]

約数ペア:

[(1, 281544440), (2, 140772220), (4, 70386110), (5, 56308888), (8, 35193055), (10, 28154444), (20, 14077222), (40, 7038611), (97, 2902520), (149, 1889560), (194, 1451260), (298, 944780), (388, 725630), (485, 580504), (487, 578120), (596, 472390), (745, 377912), (776, 362815), (970, 290252), (974, 289060), (1192, 236195), (1490, 188956), (1940, 145126), (1948, 144530), (2435, 115624), (2980, 94478), (3880, 72563), (3896, 72265), (4870, 57812), (5960, 47239), (9740, 28906), (14453, 19480)]