20378380

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{211}}^1\times {\mathrm{439}}^1$

素因数の和:670

約数の個数: 48

約数和(自身を含む): 47013120

約数和(自身を除く): 26634740

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 211, 220, 422, 439, 844, 878, 1055, 1756, 2110, 2195, 2321, 4220, 4390, 4642, 4829, 8780, 9284, 9658, 11605, 19316, 23210, 24145, 46420, 48290, 92629, 96580, 185258, 370516, 463145, 926290, 1018919, 1852580, 2037838, 4075676, 5094595, 10189190, 20378380]

約数ペア:

[(1, 20378380), (2, 10189190), (4, 5094595), (5, 4075676), (10, 2037838), (11, 1852580), (20, 1018919), (22, 926290), (44, 463145), (55, 370516), (110, 185258), (211, 96580), (220, 92629), (422, 48290), (439, 46420), (844, 24145), (878, 23210), (1055, 19316), (1756, 11605), (2110, 9658), (2195, 9284), (2321, 8780), (4220, 4829), (4390, 4642)]