20722540

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{2371}}^1$

素因数の和:2422

約数の個数: 48

約数和(自身を含む): 47819520

約数和(自身を除く): 27096980

約数列:

[1, 2, 4, 5, 10, 19, 20, 23, 38, 46, 76, 92, 95, 115, 190, 230, 380, 437, 460, 874, 1748, 2185, 2371, 4370, 4742, 8740, 9484, 11855, 23710, 45049, 47420, 54533, 90098, 109066, 180196, 218132, 225245, 272665, 450490, 545330, 900980, 1036127, 1090660, 2072254, 4144508, 5180635, 10361270, 20722540]

約数ペア:

[(1, 20722540), (2, 10361270), (4, 5180635), (5, 4144508), (10, 2072254), (19, 1090660), (20, 1036127), (23, 900980), (38, 545330), (46, 450490), (76, 272665), (92, 225245), (95, 218132), (115, 180196), (190, 109066), (230, 90098), (380, 54533), (437, 47420), (460, 45049), (874, 23710), (1748, 11855), (2185, 9484), (2371, 8740), (4370, 4742)]