21710075

素因数分解:

$5^2\times {\mathrm{31}}^1\times {\mathrm{109}}^1\times {\mathrm{257}}^1$

素因数の和:407

約数の個数: 24

約数和(自身を含む): 28152960

約数和(自身を除く): 6442885

約数列:

[1, 5, 25, 31, 109, 155, 257, 545, 775, 1285, 2725, 3379, 6425, 7967, 16895, 28013, 39835, 84475, 140065, 199175, 700325, 868403, 4342015, 21710075]

約数ペア:

[(1, 21710075), (5, 4342015), (25, 868403), (31, 700325), (109, 199175), (155, 140065), (257, 84475), (545, 39835), (775, 28013), (1285, 16895), (2725, 7967), (3379, 6425)]