201516220

素因数分解:

$2^2\times 5^1\times {\mathrm{491}}^1\times {\mathrm{20521}}^1$

素因数の和:21021

約数の個数: 24

約数和(自身を含む): 424066608

約数和(自身を除く): 222550388

約数列:

[1, 2, 4, 5, 10, 20, 491, 982, 1964, 2455, 4910, 9820, 20521, 41042, 82084, 102605, 205210, 410420, 10075811, 20151622, 40303244, 50379055, 100758110, 201516220]

約数ペア:

[(1, 201516220), (2, 100758110), (4, 50379055), (5, 40303244), (10, 20151622), (20, 10075811), (491, 410420), (982, 205210), (1964, 102605), (2455, 82084), (4910, 41042), (9820, 20521)]