21167560

素因数分解:

$2^3\times 5^1\times {\mathrm{643}}^1\times {\mathrm{823}}^1$

素因数の和:1477

約数の個数: 32

約数和(自身を含む): 47759040

約数和(自身を除く): 26591480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 643, 823, 1286, 1646, 2572, 3215, 3292, 4115, 5144, 6430, 6584, 8230, 12860, 16460, 25720, 32920, 529189, 1058378, 2116756, 2645945, 4233512, 5291890, 10583780, 21167560]

約数ペア:

[(1, 21167560), (2, 10583780), (4, 5291890), (5, 4233512), (8, 2645945), (10, 2116756), (20, 1058378), (40, 529189), (643, 32920), (823, 25720), (1286, 16460), (1646, 12860), (2572, 8230), (3215, 6584), (3292, 6430), (4115, 5144)]