21063440

素因数分解:

$2^4\times 5^1\times {\mathrm{263293}}^1$

素因数の和:263306

約数の個数: 20

約数和(自身を含む): 48972684

約数和(自身を除く): 27909244

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 263293, 526586, 1053172, 1316465, 2106344, 2632930, 4212688, 5265860, 10531720, 21063440]

約数ペア:

[(1, 21063440), (2, 10531720), (4, 5265860), (5, 4212688), (8, 2632930), (10, 2106344), (16, 1316465), (20, 1053172), (40, 526586), (80, 263293)]