81223600

素因数分解:

$2^4\times 5^2\times {\mathrm{251}}^1\times {\mathrm{809}}^1$

素因数の和:1078

約数の個数: 60

約数和(自身を含む): 196159320

約数和(自身を除く): 114935720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 251, 400, 502, 809, 1004, 1255, 1618, 2008, 2510, 3236, 4016, 4045, 5020, 6275, 6472, 8090, 10040, 12550, 12944, 16180, 20080, 20225, 25100, 32360, 40450, 50200, 64720, 80900, 100400, 161800, 203059, 323600, 406118, 812236, 1015295, 1624472, 2030590, 3248944, 4061180, 5076475, 8122360, 10152950, 16244720, 20305900, 40611800, 81223600]

約数ペア:

[(1, 81223600), (2, 40611800), (4, 20305900), (5, 16244720), (8, 10152950), (10, 8122360), (16, 5076475), (20, 4061180), (25, 3248944), (40, 2030590), (50, 1624472), (80, 1015295), (100, 812236), (200, 406118), (251, 323600), (400, 203059), (502, 161800), (809, 100400), (1004, 80900), (1255, 64720), (1618, 50200), (2008, 40450), (2510, 32360), (3236, 25100), (4016, 20225), (4045, 20080), (5020, 16180), (6275, 12944), (6472, 12550), (8090, 10040)]