19040980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{277}}^1\times {\mathrm{491}}^1$

素因数の和:784

約数の個数: 48

約数和(自身を含む): 45956736

約数和(自身を除く): 26915756

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 277, 491, 554, 982, 1108, 1385, 1939, 1964, 2455, 2770, 3437, 3878, 4910, 5540, 6874, 7756, 9695, 9820, 13748, 17185, 19390, 34370, 38780, 68740, 136007, 272014, 544028, 680035, 952049, 1360070, 1904098, 2720140, 3808196, 4760245, 9520490, 19040980]

約数ペア:

[(1, 19040980), (2, 9520490), (4, 4760245), (5, 3808196), (7, 2720140), (10, 1904098), (14, 1360070), (20, 952049), (28, 680035), (35, 544028), (70, 272014), (140, 136007), (277, 68740), (491, 38780), (554, 34370), (982, 19390), (1108, 17185), (1385, 13748), (1939, 9820), (1964, 9695), (2455, 7756), (2770, 6874), (3437, 5540), (3878, 4910)]