21840028

素因数分解:

$2^2\times 7^1\times {\mathrm{53}}^1\times {\mathrm{14717}}^1$

素因数の和:14781

約数の個数: 24

約数和(自身を含む): 44507232

約数和(自身を除く): 22667204

約数列:

[1, 2, 4, 7, 14, 28, 53, 106, 212, 371, 742, 1484, 14717, 29434, 58868, 103019, 206038, 412076, 780001, 1560002, 3120004, 5460007, 10920014, 21840028]

約数ペア:

[(1, 21840028), (2, 10920014), (4, 5460007), (7, 3120004), (14, 1560002), (28, 780001), (53, 412076), (106, 206038), (212, 103019), (371, 58868), (742, 29434), (1484, 14717)]