21782684

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{197}}^1\times {\mathrm{359}}^1$

素因数の和:578

約数の個数: 48

約数和(自身を含む): 47900160

約数和(自身を除く): 26117476

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 77, 154, 197, 308, 359, 394, 718, 788, 1379, 1436, 2167, 2513, 2758, 3949, 4334, 5026, 5516, 7898, 8668, 10052, 15169, 15796, 27643, 30338, 55286, 60676, 70723, 110572, 141446, 282892, 495061, 777953, 990122, 1555906, 1980244, 3111812, 5445671, 10891342, 21782684]

約数ペア:

[(1, 21782684), (2, 10891342), (4, 5445671), (7, 3111812), (11, 1980244), (14, 1555906), (22, 990122), (28, 777953), (44, 495061), (77, 282892), (154, 141446), (197, 110572), (308, 70723), (359, 60676), (394, 55286), (718, 30338), (788, 27643), (1379, 15796), (1436, 15169), (2167, 10052), (2513, 8668), (2758, 7898), (3949, 5516), (4334, 5026)]