21989075

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{1669}}^1$

素因数の和:1727

約数の個数: 24

約数和(自身を含む): 29819520

約数和(自身を除く): 7830445

約数列:

[1, 5, 17, 25, 31, 85, 155, 425, 527, 775, 1669, 2635, 8345, 13175, 28373, 41725, 51739, 141865, 258695, 709325, 879563, 1293475, 4397815, 21989075]

約数ペア:

[(1, 21989075), (5, 4397815), (17, 1293475), (25, 879563), (31, 709325), (85, 258695), (155, 141865), (425, 51739), (527, 41725), (775, 28373), (1669, 13175), (2635, 8345)]