21555688

素因数分解:

$2^3\times 7^2\times {\mathrm{11}}^1\times {\mathrm{4999}}^1$

素因数の和:5030

約数の個数: 48

約数和(自身を含む): 51300000

約数和(自身を除く): 29744312

約数列:

[1, 2, 4, 7, 8, 11, 14, 22, 28, 44, 49, 56, 77, 88, 98, 154, 196, 308, 392, 539, 616, 1078, 2156, 4312, 4999, 9998, 19996, 34993, 39992, 54989, 69986, 109978, 139972, 219956, 244951, 279944, 384923, 439912, 489902, 769846, 979804, 1539692, 1959608, 2694461, 3079384, 5388922, 10777844, 21555688]

約数ペア:

[(1, 21555688), (2, 10777844), (4, 5388922), (7, 3079384), (8, 2694461), (11, 1959608), (14, 1539692), (22, 979804), (28, 769846), (44, 489902), (49, 439912), (56, 384923), (77, 279944), (88, 244951), (98, 219956), (154, 139972), (196, 109978), (308, 69986), (392, 54989), (539, 39992), (616, 34993), (1078, 19996), (2156, 9998), (4312, 4999)]