20838500

素因数分解:

$2^2\times 5^3\times {\mathrm{71}}^1\times {\mathrm{587}}^1$

素因数の和:677

約数の個数: 48

約数和(自身を含む): 46230912

約数和(自身を除く): 25392412

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 71, 100, 125, 142, 250, 284, 355, 500, 587, 710, 1174, 1420, 1775, 2348, 2935, 3550, 5870, 7100, 8875, 11740, 14675, 17750, 29350, 35500, 41677, 58700, 73375, 83354, 146750, 166708, 208385, 293500, 416770, 833540, 1041925, 2083850, 4167700, 5209625, 10419250, 20838500]

約数ペア:

[(1, 20838500), (2, 10419250), (4, 5209625), (5, 4167700), (10, 2083850), (20, 1041925), (25, 833540), (50, 416770), (71, 293500), (100, 208385), (125, 166708), (142, 146750), (250, 83354), (284, 73375), (355, 58700), (500, 41677), (587, 35500), (710, 29350), (1174, 17750), (1420, 14675), (1775, 11740), (2348, 8875), (2935, 7100), (3550, 5870)]