21387954

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{16427}}^1$

素因数の和:16470

約数の個数: 32

約数和(自身を含む): 50466816

約数和(自身を除く): 29078862

約数列:

[1, 2, 3, 6, 7, 14, 21, 31, 42, 62, 93, 186, 217, 434, 651, 1302, 16427, 32854, 49281, 98562, 114989, 229978, 344967, 509237, 689934, 1018474, 1527711, 3055422, 3564659, 7129318, 10693977, 21387954]

約数ペア:

[(1, 21387954), (2, 10693977), (3, 7129318), (6, 3564659), (7, 3055422), (14, 1527711), (21, 1018474), (31, 689934), (42, 509237), (62, 344967), (93, 229978), (186, 114989), (217, 98562), (434, 49281), (651, 32854), (1302, 16427)]