20725180

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{4001}}^1$

素因数の和:4054

約数の個数: 48

約数和(自身を含む): 51097536

約数和(自身を除く): 30372356

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 37, 70, 74, 140, 148, 185, 259, 370, 518, 740, 1036, 1295, 2590, 4001, 5180, 8002, 16004, 20005, 28007, 40010, 56014, 80020, 112028, 140035, 148037, 280070, 296074, 560140, 592148, 740185, 1036259, 1480370, 2072518, 2960740, 4145036, 5181295, 10362590, 20725180]

約数ペア:

[(1, 20725180), (2, 10362590), (4, 5181295), (5, 4145036), (7, 2960740), (10, 2072518), (14, 1480370), (20, 1036259), (28, 740185), (35, 592148), (37, 560140), (70, 296074), (74, 280070), (140, 148037), (148, 140035), (185, 112028), (259, 80020), (370, 56014), (518, 40010), (740, 28007), (1036, 20005), (1295, 16004), (2590, 8002), (4001, 5180)]