17800280

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{79}}^1\times {\mathrm{131}}^1$

素因数の和:264

約数の個数: 64

約数和(自身を含む): 41817600

約数和(自身を除く): 24017320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 79, 86, 131, 158, 172, 215, 262, 316, 344, 395, 430, 524, 632, 655, 790, 860, 1048, 1310, 1580, 1720, 2620, 3160, 3397, 5240, 5633, 6794, 10349, 11266, 13588, 16985, 20698, 22532, 27176, 28165, 33970, 41396, 45064, 51745, 56330, 67940, 82792, 103490, 112660, 135880, 206980, 225320, 413960, 445007, 890014, 1780028, 2225035, 3560056, 4450070, 8900140, 17800280]

約数ペア:

[(1, 17800280), (2, 8900140), (4, 4450070), (5, 3560056), (8, 2225035), (10, 1780028), (20, 890014), (40, 445007), (43, 413960), (79, 225320), (86, 206980), (131, 135880), (158, 112660), (172, 103490), (215, 82792), (262, 67940), (316, 56330), (344, 51745), (395, 45064), (430, 41396), (524, 33970), (632, 28165), (655, 27176), (790, 22532), (860, 20698), (1048, 16985), (1310, 13588), (1580, 11266), (1720, 10349), (2620, 6794), (3160, 5633), (3397, 5240)]