21003556

素因数分解:

$2^2\times 7^2\times {\mathrm{101}}^1\times {\mathrm{1061}}^1$

素因数の和:1180

約数の個数: 36

約数和(自身を含む): 43221276

約数和(自身を除く): 22217720

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 101, 196, 202, 404, 707, 1061, 1414, 2122, 2828, 4244, 4949, 7427, 9898, 14854, 19796, 29708, 51989, 103978, 107161, 207956, 214322, 428644, 750127, 1500254, 3000508, 5250889, 10501778, 21003556]

約数ペア:

[(1, 21003556), (2, 10501778), (4, 5250889), (7, 3000508), (14, 1500254), (28, 750127), (49, 428644), (98, 214322), (101, 207956), (196, 107161), (202, 103978), (404, 51989), (707, 29708), (1061, 19796), (1414, 14854), (2122, 9898), (2828, 7427), (4244, 4949)]