19806920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{557}}^1$

素因数の和:702

約数の個数: 64

約数和(自身を含む): 51425280

約数和(自身を除く): 31618360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 127, 140, 254, 280, 508, 557, 635, 889, 1016, 1114, 1270, 1778, 2228, 2540, 2785, 3556, 3899, 4445, 4456, 5080, 5570, 7112, 7798, 8890, 11140, 15596, 17780, 19495, 22280, 31192, 35560, 38990, 70739, 77980, 141478, 155960, 282956, 353695, 495173, 565912, 707390, 990346, 1414780, 1980692, 2475865, 2829560, 3961384, 4951730, 9903460, 19806920]

約数ペア:

[(1, 19806920), (2, 9903460), (4, 4951730), (5, 3961384), (7, 2829560), (8, 2475865), (10, 1980692), (14, 1414780), (20, 990346), (28, 707390), (35, 565912), (40, 495173), (56, 353695), (70, 282956), (127, 155960), (140, 141478), (254, 77980), (280, 70739), (508, 38990), (557, 35560), (635, 31192), (889, 22280), (1016, 19495), (1114, 17780), (1270, 15596), (1778, 11140), (2228, 8890), (2540, 7798), (2785, 7112), (3556, 5570), (3899, 5080), (4445, 4456)]