21538520

素因数分解:

$2^3\times 5^1\times {\mathrm{233}}^1\times {\mathrm{2311}}^1$

素因数の和:2555

約数の個数: 32

約数和(自身を含む): 48690720

約数和(自身を除く): 27152200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 233, 466, 932, 1165, 1864, 2311, 2330, 4622, 4660, 9244, 9320, 11555, 18488, 23110, 46220, 92440, 538463, 1076926, 2153852, 2692315, 4307704, 5384630, 10769260, 21538520]

約数ペア:

[(1, 21538520), (2, 10769260), (4, 5384630), (5, 4307704), (8, 2692315), (10, 2153852), (20, 1076926), (40, 538463), (233, 92440), (466, 46220), (932, 23110), (1165, 18488), (1864, 11555), (2311, 9320), (2330, 9244), (4622, 4660)]