20281540

素因数分解:

$2^2\times 5^1\times {\mathrm{239}}^1\times {\mathrm{4243}}^1$

素因数の和:4491

約数の個数: 24

約数和(自身を含む): 42779520

約数和(自身を除く): 22497980

約数列:

[1, 2, 4, 5, 10, 20, 239, 478, 956, 1195, 2390, 4243, 4780, 8486, 16972, 21215, 42430, 84860, 1014077, 2028154, 4056308, 5070385, 10140770, 20281540]

約数ペア:

[(1, 20281540), (2, 10140770), (4, 5070385), (5, 4056308), (10, 2028154), (20, 1014077), (239, 84860), (478, 42430), (956, 21215), (1195, 16972), (2390, 8486), (4243, 4780)]