21496760

素因数分解:

$2^3\times 5^1\times {\mathrm{653}}^1\times {\mathrm{823}}^1$

素因数の和:1487

約数の個数: 32

約数和(自身を含む): 48500640

約数和(自身を除く): 27003880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 653, 823, 1306, 1646, 2612, 3265, 3292, 4115, 5224, 6530, 6584, 8230, 13060, 16460, 26120, 32920, 537419, 1074838, 2149676, 2687095, 4299352, 5374190, 10748380, 21496760]

約数ペア:

[(1, 21496760), (2, 10748380), (4, 5374190), (5, 4299352), (8, 2687095), (10, 2149676), (20, 1074838), (40, 537419), (653, 32920), (823, 26120), (1306, 16460), (1646, 13060), (2612, 8230), (3265, 6584), (3292, 6530), (4115, 5224)]