19975720

素因数分解:

$2^3\times 5^1\times {\mathrm{73}}^1\times {\mathrm{6841}}^1$

素因数の和:6925

約数の個数: 32

約数和(自身を含む): 45567720

約数和(自身を除く): 25592000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 73, 146, 292, 365, 584, 730, 1460, 2920, 6841, 13682, 27364, 34205, 54728, 68410, 136820, 273640, 499393, 998786, 1997572, 2496965, 3995144, 4993930, 9987860, 19975720]

約数ペア:

[(1, 19975720), (2, 9987860), (4, 4993930), (5, 3995144), (8, 2496965), (10, 1997572), (20, 998786), (40, 499393), (73, 273640), (146, 136820), (292, 68410), (365, 54728), (584, 34205), (730, 27364), (1460, 13682), (2920, 6841)]