20666000

素因数分解:

$2^4\times 5^3\times {\mathrm{10333}}^1$

素因数の和:10356

約数の個数: 40

約数和(自身を含む): 49975224

約数和(自身を除く): 29309224

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 1000, 2000, 10333, 20666, 41332, 51665, 82664, 103330, 165328, 206660, 258325, 413320, 516650, 826640, 1033300, 1291625, 2066600, 2583250, 4133200, 5166500, 10333000, 20666000]

約数ペア:

[(1, 20666000), (2, 10333000), (4, 5166500), (5, 4133200), (8, 2583250), (10, 2066600), (16, 1291625), (20, 1033300), (25, 826640), (40, 516650), (50, 413320), (80, 258325), (100, 206660), (125, 165328), (200, 103330), (250, 82664), (400, 51665), (500, 41332), (1000, 20666), (2000, 10333)]