19229980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{12487}}^1$

素因数の和:12514

約数の個数: 48

約数和(自身を含む): 50351616

約数和(自身を除く): 31121636

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 770, 1540, 12487, 24974, 49948, 62435, 87409, 124870, 137357, 174818, 249740, 274714, 349636, 437045, 549428, 686785, 874090, 961499, 1373570, 1748180, 1922998, 2747140, 3845996, 4807495, 9614990, 19229980]

約数ペア:

[(1, 19229980), (2, 9614990), (4, 4807495), (5, 3845996), (7, 2747140), (10, 1922998), (11, 1748180), (14, 1373570), (20, 961499), (22, 874090), (28, 686785), (35, 549428), (44, 437045), (55, 349636), (70, 274714), (77, 249740), (110, 174818), (140, 137357), (154, 124870), (220, 87409), (308, 62435), (385, 49948), (770, 24974), (1540, 12487)]