389700920

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{198827}}^1$

素因数の和:198852

約数の個数: 48

約数和(自身を含む): 1019987640

約数和(自身を除く): 630286720

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 392, 490, 980, 1960, 198827, 397654, 795308, 994135, 1391789, 1590616, 1988270, 2783578, 3976540, 5567156, 6958945, 7953080, 9742523, 11134312, 13917890, 19485046, 27835780, 38970092, 48712615, 55671560, 77940184, 97425230, 194850460, 389700920]

約数ペア:

[(1, 389700920), (2, 194850460), (4, 97425230), (5, 77940184), (7, 55671560), (8, 48712615), (10, 38970092), (14, 27835780), (20, 19485046), (28, 13917890), (35, 11134312), (40, 9742523), (49, 7953080), (56, 6958945), (70, 5567156), (98, 3976540), (140, 2783578), (196, 1988270), (245, 1590616), (280, 1391789), (392, 994135), (490, 795308), (980, 397654), (1960, 198827)]