20380000

素因数分解:

$2^5\times 5^4\times {\mathrm{1019}}^1$

素因数の和:1049

約数の個数: 60

約数和(自身を含む): 50187060

約数和(自身を除く): 29807060

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 160, 200, 250, 400, 500, 625, 800, 1000, 1019, 1250, 2000, 2038, 2500, 4000, 4076, 5000, 5095, 8152, 10000, 10190, 16304, 20000, 20380, 25475, 32608, 40760, 50950, 81520, 101900, 127375, 163040, 203800, 254750, 407600, 509500, 636875, 815200, 1019000, 1273750, 2038000, 2547500, 4076000, 5095000, 10190000, 20380000]

約数ペア:

[(1, 20380000), (2, 10190000), (4, 5095000), (5, 4076000), (8, 2547500), (10, 2038000), (16, 1273750), (20, 1019000), (25, 815200), (32, 636875), (40, 509500), (50, 407600), (80, 254750), (100, 203800), (125, 163040), (160, 127375), (200, 101900), (250, 81520), (400, 50950), (500, 40760), (625, 32608), (800, 25475), (1000, 20380), (1019, 20000), (1250, 16304), (2000, 10190), (2038, 10000), (2500, 8152), (4000, 5095), (4076, 5000)]