20495000

素因数分解:

$2^3\times 5^4\times {\mathrm{4099}}^1$

素因数の和:4125

約数の個数: 40

約数和(自身を含む): 48031500

約数和(自身を除く): 27536500

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 625, 1000, 1250, 2500, 4099, 5000, 8198, 16396, 20495, 32792, 40990, 81980, 102475, 163960, 204950, 409900, 512375, 819800, 1024750, 2049500, 2561875, 4099000, 5123750, 10247500, 20495000]

約数ペア:

[(1, 20495000), (2, 10247500), (4, 5123750), (5, 4099000), (8, 2561875), (10, 2049500), (20, 1024750), (25, 819800), (40, 512375), (50, 409900), (100, 204950), (125, 163960), (200, 102475), (250, 81980), (500, 40990), (625, 32792), (1000, 20495), (1250, 16396), (2500, 8198), (4099, 5000)]