21263670687

素因数分解:

$3^1\times 7^3\times {\mathrm{1321}}^1\times {\mathrm{15643}}^1$

素因数の和:16988

約数の個数: 32

約数和(自身を含む): 33090188800

約数和(自身を除く): 11826518113

約数列:

[1, 3, 7, 21, 49, 147, 343, 1029, 1321, 3963, 9247, 15643, 27741, 46929, 64729, 109501, 194187, 328503, 453103, 766507, 1359309, 2299521, 5365549, 16096647, 20664403, 61993209, 144650821, 433952463, 1012555747, 3037667241, 7087890229, 21263670687]

約数ペア:

[(1, 21263670687), (3, 7087890229), (7, 3037667241), (21, 1012555747), (49, 433952463), (147, 144650821), (343, 61993209), (1029, 20664403), (1321, 16096647), (3963, 5365549), (9247, 2299521), (15643, 1359309), (27741, 766507), (46929, 453103), (64729, 328503), (109501, 194187)]