21553491

素因数分解:

$3^1\times {\mathrm{79}}^1\times {\mathrm{199}}^1\times {\mathrm{457}}^1$

素因数の和:738

約数の個数: 16

約数和(自身を含む): 29312000

約数和(自身を除く): 7758509

約数列:

[1, 3, 79, 199, 237, 457, 597, 1371, 15721, 36103, 47163, 90943, 108309, 272829, 7184497, 21553491]

約数ペア:

[(1, 21553491), (3, 7184497), (79, 272829), (199, 108309), (237, 90943), (457, 47163), (597, 36103), (1371, 15721)]