19500040

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{9949}}^1$

素因数の和:9974

約数の個数: 48

約数和(自身を含む): 51043500

約数和(自身を除く): 31543460

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, 9949, 19898, 39796, 49745, 69643, 79592, 99490, 139286, 198980, 278572, 348215, 397960, 487501, 557144, 696430, 975002, 1392860, 1950004, 2437505, 2785720, 3900008, 4875010, 9750020, 19500040]

約数ペア:

[(1, 19500040), (2, 9750020), (4, 4875010), (5, 3900008), (7, 2785720), (8, 2437505), (10, 1950004), (14, 1392860), (20, 975002), (28, 696430), (35, 557144), (40, 487501), (49, 397960), (56, 348215), (70, 278572), (98, 198980), (140, 139286), (196, 99490), (245, 79592), (280, 69643), (392, 49745), (490, 39796), (980, 19898), (1960, 9949)]