21005455

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{6679}}^1$

素因数の和:6738

約数の個数: 16

約数和(自身を含む): 27414720

約数和(自身を除く): 6409265

約数列:

[1, 5, 17, 37, 85, 185, 629, 3145, 6679, 33395, 113543, 247123, 567715, 1235615, 4201091, 21005455]

約数ペア:

[(1, 21005455), (5, 4201091), (17, 1235615), (37, 567715), (85, 247123), (185, 113543), (629, 33395), (3145, 6679)]