20499860

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{739}}^1$

素因数の和:840

約数の個数: 48

約数和(自身を含む): 45998400

約数和(自身を除く): 25498540

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 73, 76, 95, 146, 190, 292, 365, 380, 730, 739, 1387, 1460, 1478, 2774, 2956, 3695, 5548, 6935, 7390, 13870, 14041, 14780, 27740, 28082, 53947, 56164, 70205, 107894, 140410, 215788, 269735, 280820, 539470, 1024993, 1078940, 2049986, 4099972, 5124965, 10249930, 20499860]

約数ペア:

[(1, 20499860), (2, 10249930), (4, 5124965), (5, 4099972), (10, 2049986), (19, 1078940), (20, 1024993), (38, 539470), (73, 280820), (76, 269735), (95, 215788), (146, 140410), (190, 107894), (292, 70205), (365, 56164), (380, 53947), (730, 28082), (739, 27740), (1387, 14780), (1460, 14041), (1478, 13870), (2774, 7390), (2956, 6935), (3695, 5548)]