21028940

素因数分解:

$2^2\times 5^1\times {\mathrm{709}}^1\times {\mathrm{1483}}^1$

素因数の和:2201

約数の個数: 24

約数和(自身を含む): 44252880

約数和(自身を除く): 23223940

約数列:

[1, 2, 4, 5, 10, 20, 709, 1418, 1483, 2836, 2966, 3545, 5932, 7090, 7415, 14180, 14830, 29660, 1051447, 2102894, 4205788, 5257235, 10514470, 21028940]

約数ペア:

[(1, 21028940), (2, 10514470), (4, 5257235), (5, 4205788), (10, 2102894), (20, 1051447), (709, 29660), (1418, 14830), (1483, 14180), (2836, 7415), (2966, 7090), (3545, 5932)]