20265040

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^2\times {\mathrm{137}}^1$

素因数の和:236

約数の個数: 60

約数和(自身を含む): 48589524

約数和(自身を除く): 28324484

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 80, 86, 137, 172, 215, 274, 344, 430, 548, 685, 688, 860, 1096, 1370, 1720, 1849, 2192, 2740, 3440, 3698, 5480, 5891, 7396, 9245, 10960, 11782, 14792, 18490, 23564, 29455, 29584, 36980, 47128, 58910, 73960, 94256, 117820, 147920, 235640, 253313, 471280, 506626, 1013252, 1266565, 2026504, 2533130, 4053008, 5066260, 10132520, 20265040]

約数ペア:

[(1, 20265040), (2, 10132520), (4, 5066260), (5, 4053008), (8, 2533130), (10, 2026504), (16, 1266565), (20, 1013252), (40, 506626), (43, 471280), (80, 253313), (86, 235640), (137, 147920), (172, 117820), (215, 94256), (274, 73960), (344, 58910), (430, 47128), (548, 36980), (685, 29584), (688, 29455), (860, 23564), (1096, 18490), (1370, 14792), (1720, 11782), (1849, 10960), (2192, 9245), (2740, 7396), (3440, 5891), (3698, 5480)]