81093080

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{197}}^1\times {\mathrm{251}}^1$

素因数の和:500

約数の個数: 64

約数和(自身を含む): 188606880

約数和(自身を除く): 107513800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 197, 205, 251, 328, 394, 410, 502, 788, 820, 985, 1004, 1255, 1576, 1640, 1970, 2008, 2510, 3940, 5020, 7880, 8077, 10040, 10291, 16154, 20582, 32308, 40385, 41164, 49447, 51455, 64616, 80770, 82328, 98894, 102910, 161540, 197788, 205820, 247235, 323080, 395576, 411640, 494470, 988940, 1977880, 2027327, 4054654, 8109308, 10136635, 16218616, 20273270, 40546540, 81093080]

約数ペア:

[(1, 81093080), (2, 40546540), (4, 20273270), (5, 16218616), (8, 10136635), (10, 8109308), (20, 4054654), (40, 2027327), (41, 1977880), (82, 988940), (164, 494470), (197, 411640), (205, 395576), (251, 323080), (328, 247235), (394, 205820), (410, 197788), (502, 161540), (788, 102910), (820, 98894), (985, 82328), (1004, 80770), (1255, 64616), (1576, 51455), (1640, 49447), (1970, 41164), (2008, 40385), (2510, 32308), (3940, 20582), (5020, 16154), (7880, 10291), (8077, 10040)]