21237736

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{3853}}^1$

素因数の和:3925

約数の個数: 32

約数和(自身を含む): 43704360

約数和(自身を除く): 22466624

約数列:

[1, 2, 4, 8, 13, 26, 52, 53, 104, 106, 212, 424, 689, 1378, 2756, 3853, 5512, 7706, 15412, 30824, 50089, 100178, 200356, 204209, 400712, 408418, 816836, 1633672, 2654717, 5309434, 10618868, 21237736]

約数ペア:

[(1, 21237736), (2, 10618868), (4, 5309434), (8, 2654717), (13, 1633672), (26, 816836), (52, 408418), (53, 400712), (104, 204209), (106, 200356), (212, 100178), (424, 50089), (689, 30824), (1378, 15412), (2756, 7706), (3853, 5512)]