81417560

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{313}}^1\times {\mathrm{929}}^1$

素因数の和:1260

約数の個数: 64

約数和(自身を含む): 210254400

約数和(自身を除く): 128836840

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 313, 626, 929, 1252, 1565, 1858, 2191, 2504, 3130, 3716, 4382, 4645, 6260, 6503, 7432, 8764, 9290, 10955, 12520, 13006, 17528, 18580, 21910, 26012, 32515, 37160, 43820, 52024, 65030, 87640, 130060, 260120, 290777, 581554, 1163108, 1453885, 2035439, 2326216, 2907770, 4070878, 5815540, 8141756, 10177195, 11631080, 16283512, 20354390, 40708780, 81417560]

約数ペア:

[(1, 81417560), (2, 40708780), (4, 20354390), (5, 16283512), (7, 11631080), (8, 10177195), (10, 8141756), (14, 5815540), (20, 4070878), (28, 2907770), (35, 2326216), (40, 2035439), (56, 1453885), (70, 1163108), (140, 581554), (280, 290777), (313, 260120), (626, 130060), (929, 87640), (1252, 65030), (1565, 52024), (1858, 43820), (2191, 37160), (2504, 32515), (3130, 26012), (3716, 21910), (4382, 18580), (4645, 17528), (6260, 13006), (6503, 12520), (7432, 10955), (8764, 9290)]