18978321

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{4561}}^1$

素因数の和:4656

約数の個数: 16

約数和(自身を含む): 27007040

約数和(自身を除く): 8028719

約数列:

[1, 3, 19, 57, 73, 219, 1387, 4161, 4561, 13683, 86659, 259977, 332953, 998859, 6326107, 18978321]

約数ペア:

[(1, 18978321), (3, 6326107), (19, 998859), (57, 332953), (73, 259977), (219, 86659), (1387, 13683), (4161, 4561)]