80437640

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{971}}^1$

素因数の和:1110

約数の個数: 64

約数和(自身を含む): 192456000

約数和(自身を除く): 112018360

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 109, 152, 190, 218, 380, 436, 545, 760, 872, 971, 1090, 1942, 2071, 2180, 3884, 4142, 4360, 4855, 7768, 8284, 9710, 10355, 16568, 18449, 19420, 20710, 36898, 38840, 41420, 73796, 82840, 92245, 105839, 147592, 184490, 211678, 368980, 423356, 529195, 737960, 846712, 1058390, 2010941, 2116780, 4021882, 4233560, 8043764, 10054705, 16087528, 20109410, 40218820, 80437640]

約数ペア:

[(1, 80437640), (2, 40218820), (4, 20109410), (5, 16087528), (8, 10054705), (10, 8043764), (19, 4233560), (20, 4021882), (38, 2116780), (40, 2010941), (76, 1058390), (95, 846712), (109, 737960), (152, 529195), (190, 423356), (218, 368980), (380, 211678), (436, 184490), (545, 147592), (760, 105839), (872, 92245), (971, 82840), (1090, 73796), (1942, 41420), (2071, 38840), (2180, 36898), (3884, 20710), (4142, 19420), (4360, 18449), (4855, 16568), (7768, 10355), (8284, 9710)]