19397980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{1091}}^1$

素因数の和:1234

約数の個数: 48

約数和(自身を含む): 46964736

約数和(自身を除く): 27566756

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 127, 140, 254, 508, 635, 889, 1091, 1270, 1778, 2182, 2540, 3556, 4364, 4445, 5455, 7637, 8890, 10910, 15274, 17780, 21820, 30548, 38185, 76370, 138557, 152740, 277114, 554228, 692785, 969899, 1385570, 1939798, 2771140, 3879596, 4849495, 9698990, 19397980]

約数ペア:

[(1, 19397980), (2, 9698990), (4, 4849495), (5, 3879596), (7, 2771140), (10, 1939798), (14, 1385570), (20, 969899), (28, 692785), (35, 554228), (70, 277114), (127, 152740), (140, 138557), (254, 76370), (508, 38185), (635, 30548), (889, 21820), (1091, 17780), (1270, 15274), (1778, 10910), (2182, 8890), (2540, 7637), (3556, 5455), (4364, 4445)]