81332920

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{1039}}^1$

素因数の和:1172

約数の個数: 64

約数和(自身を含む): 194688000

約数和(自身を除く): 113355080

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 103, 152, 190, 206, 380, 412, 515, 760, 824, 1030, 1039, 1957, 2060, 2078, 3914, 4120, 4156, 5195, 7828, 8312, 9785, 10390, 15656, 19570, 19741, 20780, 39140, 39482, 41560, 78280, 78964, 98705, 107017, 157928, 197410, 214034, 394820, 428068, 535085, 789640, 856136, 1070170, 2033323, 2140340, 4066646, 4280680, 8133292, 10166615, 16266584, 20333230, 40666460, 81332920]

約数ペア:

[(1, 81332920), (2, 40666460), (4, 20333230), (5, 16266584), (8, 10166615), (10, 8133292), (19, 4280680), (20, 4066646), (38, 2140340), (40, 2033323), (76, 1070170), (95, 856136), (103, 789640), (152, 535085), (190, 428068), (206, 394820), (380, 214034), (412, 197410), (515, 157928), (760, 107017), (824, 98705), (1030, 78964), (1039, 78280), (1957, 41560), (2060, 39482), (2078, 39140), (3914, 20780), (4120, 19741), (4156, 19570), (5195, 15656), (7828, 10390), (8312, 9785)]