19781727

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{55411}}^1$

素因数の和:55438

約数の個数: 16

約数和(自身を含む): 31917312

約数和(自身を除く): 12135585

約数列:

[1, 3, 7, 17, 21, 51, 119, 357, 55411, 166233, 387877, 941987, 1163631, 2825961, 6593909, 19781727]

約数ペア:

[(1, 19781727), (3, 6593909), (7, 2825961), (17, 1163631), (21, 941987), (51, 387877), (119, 166233), (357, 55411)]