40990000

素因数分解:

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

素因数の和:4127

約数の個数: 50

約数和(自身を含む): 99265100

約数和(自身を除く): 58275100

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, 4099, 5000, 8198, 10000, 16396, 20495, 32792, 40990, 65584, 81980, 102475, 163960, 204950, 327920, 409900, 512375, 819800, 1024750, 1639600, 2049500, 2561875, 4099000, 5123750, 8198000, 10247500, 20495000, 40990000]

約数ペア:

[(1, 40990000), (2, 20495000), (4, 10247500), (5, 8198000), (8, 5123750), (10, 4099000), (16, 2561875), (20, 2049500), (25, 1639600), (40, 1024750), (50, 819800), (80, 512375), (100, 409900), (125, 327920), (200, 204950), (250, 163960), (400, 102475), (500, 81980), (625, 65584), (1000, 40990), (1250, 32792), (2000, 20495), (2500, 16396), (4099, 10000), (5000, 8198)]