21280070

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{2789}}^1$

素因数の和:2912

約数の個数: 32

約数和(自身を含む): 44193600

約数和(自身を除く): 22913530

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 109, 218, 545, 763, 1090, 1526, 2789, 3815, 5578, 7630, 13945, 19523, 27890, 39046, 97615, 195230, 304001, 608002, 1520005, 2128007, 3040010, 4256014, 10640035, 21280070]

約数ペア:

[(1, 21280070), (2, 10640035), (5, 4256014), (7, 3040010), (10, 2128007), (14, 1520005), (35, 608002), (70, 304001), (109, 195230), (218, 97615), (545, 39046), (763, 27890), (1090, 19523), (1526, 13945), (2789, 7630), (3815, 5578)]