51905440

素因数分解:

$2^5\times 5^1\times {\mathrm{401}}^1\times {\mathrm{809}}^1$

素因数の和:1225

約数の個数: 48

約数和(自身を含む): 123084360

約数和(自身を除く): 71178920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 401, 802, 809, 1604, 1618, 2005, 3208, 3236, 4010, 4045, 6416, 6472, 8020, 8090, 12832, 12944, 16040, 16180, 25888, 32080, 32360, 64160, 64720, 129440, 324409, 648818, 1297636, 1622045, 2595272, 3244090, 5190544, 6488180, 10381088, 12976360, 25952720, 51905440]

約数ペア:

[(1, 51905440), (2, 25952720), (4, 12976360), (5, 10381088), (8, 6488180), (10, 5190544), (16, 3244090), (20, 2595272), (32, 1622045), (40, 1297636), (80, 648818), (160, 324409), (401, 129440), (802, 64720), (809, 64160), (1604, 32360), (1618, 32080), (2005, 25888), (3208, 16180), (3236, 16040), (4010, 12944), (4045, 12832), (6416, 8090), (6472, 8020)]