21055979

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{2999}}^1$

素因数の和:3082

約数の個数: 16

約数和(自身を含む): 25920000

約数和(自身を除く): 4864021

約数列:

[1, 7, 17, 59, 119, 413, 1003, 2999, 7021, 20993, 50983, 176941, 356881, 1238587, 3007997, 21055979]

約数ペア:

[(1, 21055979), (7, 3007997), (17, 1238587), (59, 356881), (119, 176941), (413, 50983), (1003, 20993), (2999, 7021)]