19865720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{70949}}^1$

素因数の和:70967

約数の個数: 32

約数和(自身を含む): 51084000

約数和(自身を除く): 31218280

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 70949, 141898, 283796, 354745, 496643, 567592, 709490, 993286, 1418980, 1986572, 2483215, 2837960, 3973144, 4966430, 9932860, 19865720]

約数ペア:

[(1, 19865720), (2, 9932860), (4, 4966430), (5, 3973144), (7, 2837960), (8, 2483215), (10, 1986572), (14, 1418980), (20, 993286), (28, 709490), (35, 567592), (40, 496643), (56, 354745), (70, 283796), (140, 141898), (280, 70949)]