19882000

素因数分解:

$2^4\times 5^3\times {\mathrm{9941}}^1$

素因数の和:9964

約数の個数: 40

約数和(自身を含む): 48079512

約数和(自身を除く): 28197512

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 1000, 2000, 9941, 19882, 39764, 49705, 79528, 99410, 159056, 198820, 248525, 397640, 497050, 795280, 994100, 1242625, 1988200, 2485250, 3976400, 4970500, 9941000, 19882000]

約数ペア:

[(1, 19882000), (2, 9941000), (4, 4970500), (5, 3976400), (8, 2485250), (10, 1988200), (16, 1242625), (20, 994100), (25, 795280), (40, 497050), (50, 397640), (80, 248525), (100, 198820), (125, 159056), (200, 99410), (250, 79528), (400, 49705), (500, 39764), (1000, 19882), (2000, 9941)]