20278895

素因数分解:

$5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{6367}}^1$

素因数の和:6399

約数の個数: 24

約数和(自身を含む): 30489984

約数和(自身を除く): 10211089

約数列:

[1, 5, 7, 13, 35, 49, 65, 91, 245, 455, 637, 3185, 6367, 31835, 44569, 82771, 222845, 311983, 413855, 579397, 1559915, 2896985, 4055779, 20278895]

約数ペア:

[(1, 20278895), (5, 4055779), (7, 2896985), (13, 1559915), (35, 579397), (49, 413855), (65, 311983), (91, 222845), (245, 82771), (455, 44569), (637, 31835), (3185, 6367)]