643915400

素因数分解:

$2^3\times 5^2\times {\mathrm{101}}^1\times {\mathrm{127}}^1\times {\mathrm{251}}^1$

素因数の和:495

約数の個数: 96

約数和(自身を含む): 1529902080

約数和(自身を除く): 885986680

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 101, 127, 200, 202, 251, 254, 404, 502, 505, 508, 635, 808, 1004, 1010, 1016, 1255, 1270, 2008, 2020, 2510, 2525, 2540, 3175, 4040, 5020, 5050, 5080, 6275, 6350, 10040, 10100, 12550, 12700, 12827, 20200, 25100, 25351, 25400, 25654, 31877, 50200, 50702, 51308, 63754, 64135, 101404, 102616, 126755, 127508, 128270, 159385, 202808, 253510, 255016, 256540, 318770, 320675, 507020, 513080, 633775, 637540, 641350, 796925, 1014040, 1267550, 1275080, 1282700, 1593850, 2535100, 2565400, 3187700, 3219577, 5070200, 6375400, 6439154, 12878308, 16097885, 25756616, 32195770, 64391540, 80489425, 128783080, 160978850, 321957700, 643915400]

約数ペア:

[(1, 643915400), (2, 321957700), (4, 160978850), (5, 128783080), (8, 80489425), (10, 64391540), (20, 32195770), (25, 25756616), (40, 16097885), (50, 12878308), (100, 6439154), (101, 6375400), (127, 5070200), (200, 3219577), (202, 3187700), (251, 2565400), (254, 2535100), (404, 1593850), (502, 1282700), (505, 1275080), (508, 1267550), (635, 1014040), (808, 796925), (1004, 641350), (1010, 637540), (1016, 633775), (1255, 513080), (1270, 507020), (2008, 320675), (2020, 318770), (2510, 256540), (2525, 255016), (2540, 253510), (3175, 202808), (4040, 159385), (5020, 128270), (5050, 127508), (5080, 126755), (6275, 102616), (6350, 101404), (10040, 64135), (10100, 63754), (12550, 51308), (12700, 50702), (12827, 50200), (20200, 31877), (25100, 25654), (25351, 25400)]