20486920

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^2\times {\mathrm{277}}^1$

素因数の和:374

約数の個数: 48

約数和(自身を含む): 47362860

約数和(自身を除く): 26875940

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 277, 344, 430, 554, 860, 1108, 1385, 1720, 1849, 2216, 2770, 3698, 5540, 7396, 9245, 11080, 11911, 14792, 18490, 23822, 36980, 47644, 59555, 73960, 95288, 119110, 238220, 476440, 512173, 1024346, 2048692, 2560865, 4097384, 5121730, 10243460, 20486920]

約数ペア:

[(1, 20486920), (2, 10243460), (4, 5121730), (5, 4097384), (8, 2560865), (10, 2048692), (20, 1024346), (40, 512173), (43, 476440), (86, 238220), (172, 119110), (215, 95288), (277, 73960), (344, 59555), (430, 47644), (554, 36980), (860, 23822), (1108, 18490), (1385, 14792), (1720, 11911), (1849, 11080), (2216, 9245), (2770, 7396), (3698, 5540)]