21011872

素因数分解:

$2^5\times 7^1\times {\mathrm{19}}^1\times {\mathrm{4937}}^1$

素因数の和:4973

約数の個数: 48

約数和(自身を含む): 49775040

約数和(自身を除く): 28763168

約数列:

[1, 2, 4, 7, 8, 14, 16, 19, 28, 32, 38, 56, 76, 112, 133, 152, 224, 266, 304, 532, 608, 1064, 2128, 4256, 4937, 9874, 19748, 34559, 39496, 69118, 78992, 93803, 138236, 157984, 187606, 276472, 375212, 552944, 656621, 750424, 1105888, 1313242, 1500848, 2626484, 3001696, 5252968, 10505936, 21011872]

約数ペア:

[(1, 21011872), (2, 10505936), (4, 5252968), (7, 3001696), (8, 2626484), (14, 1500848), (16, 1313242), (19, 1105888), (28, 750424), (32, 656621), (38, 552944), (56, 375212), (76, 276472), (112, 187606), (133, 157984), (152, 138236), (224, 93803), (266, 78992), (304, 69118), (532, 39496), (608, 34559), (1064, 19748), (2128, 9874), (4256, 4937)]