81640520

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^3\times {\mathrm{929}}^1$

素因数の和:979

約数の個数: 64

約数和(自身を含む): 199206000

約数和(自身を除く): 117565480

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 169, 260, 338, 520, 676, 845, 929, 1352, 1690, 1858, 2197, 3380, 3716, 4394, 4645, 6760, 7432, 8788, 9290, 10985, 12077, 17576, 18580, 21970, 24154, 37160, 43940, 48308, 60385, 87880, 96616, 120770, 157001, 241540, 314002, 483080, 628004, 785005, 1256008, 1570010, 2041013, 3140020, 4082026, 6280040, 8164052, 10205065, 16328104, 20410130, 40820260, 81640520]

約数ペア:

[(1, 81640520), (2, 40820260), (4, 20410130), (5, 16328104), (8, 10205065), (10, 8164052), (13, 6280040), (20, 4082026), (26, 3140020), (40, 2041013), (52, 1570010), (65, 1256008), (104, 785005), (130, 628004), (169, 483080), (260, 314002), (338, 241540), (520, 157001), (676, 120770), (845, 96616), (929, 87880), (1352, 60385), (1690, 48308), (1858, 43940), (2197, 37160), (3380, 24154), (3716, 21970), (4394, 18580), (4645, 17576), (6760, 12077), (7432, 10985), (8788, 9290)]