19813780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{307}}^1\times {\mathrm{461}}^1$

素因数の和:784

約数の個数: 48

約数和(自身を含む): 47811456

約数和(自身を除く): 27997676

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 307, 461, 614, 922, 1228, 1535, 1844, 2149, 2305, 3070, 3227, 4298, 4610, 6140, 6454, 8596, 9220, 10745, 12908, 16135, 21490, 32270, 42980, 64540, 141527, 283054, 566108, 707635, 990689, 1415270, 1981378, 2830540, 3962756, 4953445, 9906890, 19813780]

約数ペア:

[(1, 19813780), (2, 9906890), (4, 4953445), (5, 3962756), (7, 2830540), (10, 1981378), (14, 1415270), (20, 990689), (28, 707635), (35, 566108), (70, 283054), (140, 141527), (307, 64540), (461, 42980), (614, 32270), (922, 21490), (1228, 16135), (1535, 12908), (1844, 10745), (2149, 9220), (2305, 8596), (3070, 6454), (3227, 6140), (4298, 4610)]