21428920

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{14479}}^1$

素因数の和:14527

約数の個数: 32

約数和(自身を含む): 49521600

約数和(自身を除く): 28092680

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 74, 148, 185, 296, 370, 740, 1480, 14479, 28958, 57916, 72395, 115832, 144790, 289580, 535723, 579160, 1071446, 2142892, 2678615, 4285784, 5357230, 10714460, 21428920]

約数ペア:

[(1, 21428920), (2, 10714460), (4, 5357230), (5, 4285784), (8, 2678615), (10, 2142892), (20, 1071446), (37, 579160), (40, 535723), (74, 289580), (148, 144790), (185, 115832), (296, 72395), (370, 57916), (740, 28958), (1480, 14479)]