81376880

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^3\times {\mathrm{463}}^1$

素因数の和:515

約数の個数: 80

約数和(自身を含む): 205403520

約数和(自身を除く): 124026640

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 169, 208, 260, 338, 463, 520, 676, 845, 926, 1040, 1352, 1690, 1852, 2197, 2315, 2704, 3380, 3704, 4394, 4630, 6019, 6760, 7408, 8788, 9260, 10985, 12038, 13520, 17576, 18520, 21970, 24076, 30095, 35152, 37040, 43940, 48152, 60190, 78247, 87880, 96304, 120380, 156494, 175760, 240760, 312988, 391235, 481520, 625976, 782470, 1017211, 1251952, 1564940, 2034422, 3129880, 4068844, 5086055, 6259760, 8137688, 10172110, 16275376, 20344220, 40688440, 81376880]

約数ペア:

[(1, 81376880), (2, 40688440), (4, 20344220), (5, 16275376), (8, 10172110), (10, 8137688), (13, 6259760), (16, 5086055), (20, 4068844), (26, 3129880), (40, 2034422), (52, 1564940), (65, 1251952), (80, 1017211), (104, 782470), (130, 625976), (169, 481520), (208, 391235), (260, 312988), (338, 240760), (463, 175760), (520, 156494), (676, 120380), (845, 96304), (926, 87880), (1040, 78247), (1352, 60190), (1690, 48152), (1852, 43940), (2197, 37040), (2315, 35152), (2704, 30095), (3380, 24076), (3704, 21970), (4394, 18520), (4630, 17576), (6019, 13520), (6760, 12038), (7408, 10985), (8788, 9260)]