20480020

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{127}}^1\times {\mathrm{733}}^1$

素因数の和:880

約数の個数: 48

約数和(自身を含む): 47351808

約数和(自身を除く): 26871788

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 127, 220, 254, 508, 635, 733, 1270, 1397, 1466, 2540, 2794, 2932, 3665, 5588, 6985, 7330, 8063, 13970, 14660, 16126, 27940, 32252, 40315, 80630, 93091, 161260, 186182, 372364, 465455, 930910, 1024001, 1861820, 2048002, 4096004, 5120005, 10240010, 20480020]

約数ペア:

[(1, 20480020), (2, 10240010), (4, 5120005), (5, 4096004), (10, 2048002), (11, 1861820), (20, 1024001), (22, 930910), (44, 465455), (55, 372364), (110, 186182), (127, 161260), (220, 93091), (254, 80630), (508, 40315), (635, 32252), (733, 27940), (1270, 16126), (1397, 14660), (1466, 13970), (2540, 8063), (2794, 7330), (2932, 6985), (3665, 5588)]