20811868

素因数分解:

$2^2\times 7^4\times {\mathrm{11}}^1\times {\mathrm{197}}^1$

素因数の和:240

約数の個数: 60

約数和(自身を含む): 46586232

約数和(自身を除く): 25774364

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 49, 77, 98, 154, 196, 197, 308, 343, 394, 539, 686, 788, 1078, 1372, 1379, 2156, 2167, 2401, 2758, 3773, 4334, 4802, 5516, 7546, 8668, 9604, 9653, 15092, 15169, 19306, 26411, 30338, 38612, 52822, 60676, 67571, 105644, 106183, 135142, 212366, 270284, 424732, 472997, 743281, 945994, 1486562, 1891988, 2973124, 5202967, 10405934, 20811868]

約数ペア:

[(1, 20811868), (2, 10405934), (4, 5202967), (7, 2973124), (11, 1891988), (14, 1486562), (22, 945994), (28, 743281), (44, 472997), (49, 424732), (77, 270284), (98, 212366), (154, 135142), (196, 106183), (197, 105644), (308, 67571), (343, 60676), (394, 52822), (539, 38612), (686, 30338), (788, 26411), (1078, 19306), (1372, 15169), (1379, 15092), (2156, 9653), (2167, 9604), (2401, 8668), (2758, 7546), (3773, 5516), (4334, 4802)]