21251308

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{349}}^1\times {\mathrm{1171}}^1$

素因数の和:1537

約数の個数: 24

約数和(自身を含む): 40199600

約数和(自身を除く): 18948292

約数列:

[1, 2, 4, 13, 26, 52, 349, 698, 1171, 1396, 2342, 4537, 4684, 9074, 15223, 18148, 30446, 60892, 408679, 817358, 1634716, 5312827, 10625654, 21251308]

約数ペア:

[(1, 21251308), (2, 10625654), (4, 5312827), (13, 1634716), (26, 817358), (52, 408679), (349, 60892), (698, 30446), (1171, 18148), (1396, 15223), (2342, 9074), (4537, 4684)]