81910000

素因数分解:

$2^4\times 5^4\times {\mathrm{8191}}^1$

素因数の和:8219

約数の個数: 50

約数和(自身を含む): 198336512

約数和(自身を除く): 116426512

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 625, 1000, 1250, 2000, 2500, 5000, 8191, 10000, 16382, 32764, 40955, 65528, 81910, 131056, 163820, 204775, 327640, 409550, 655280, 819100, 1023875, 1638200, 2047750, 3276400, 4095500, 5119375, 8191000, 10238750, 16382000, 20477500, 40955000, 81910000]

約数ペア:

[(1, 81910000), (2, 40955000), (4, 20477500), (5, 16382000), (8, 10238750), (10, 8191000), (16, 5119375), (20, 4095500), (25, 3276400), (40, 2047750), (50, 1638200), (80, 1023875), (100, 819100), (125, 655280), (200, 409550), (250, 327640), (400, 204775), (500, 163820), (625, 131056), (1000, 81910), (1250, 65528), (2000, 40955), (2500, 32764), (5000, 16382), (8191, 10000)]