20538280

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{73351}}^1$

素因数の和:73369

約数の個数: 32

約数和(自身を含む): 52813440

約数和(自身を除く): 32275160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 73351, 146702, 293404, 366755, 513457, 586808, 733510, 1026914, 1467020, 2053828, 2567285, 2934040, 4107656, 5134570, 10269140, 20538280]

約数ペア:

[(1, 20538280), (2, 10269140), (4, 5134570), (5, 4107656), (7, 2934040), (8, 2567285), (10, 2053828), (14, 1467020), (20, 1026914), (28, 733510), (35, 586808), (40, 513457), (56, 366755), (70, 293404), (140, 146702), (280, 73351)]