20412140

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{211}}^1\times {\mathrm{691}}^1$

素因数の和:918

約数の個数: 48

約数和(自身を含む): 49292544

約数和(自身を除く): 28880404

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 211, 422, 691, 844, 1055, 1382, 1477, 2110, 2764, 2954, 3455, 4220, 4837, 5908, 6910, 7385, 9674, 13820, 14770, 19348, 24185, 29540, 48370, 96740, 145801, 291602, 583204, 729005, 1020607, 1458010, 2041214, 2916020, 4082428, 5103035, 10206070, 20412140]

約数ペア:

[(1, 20412140), (2, 10206070), (4, 5103035), (5, 4082428), (7, 2916020), (10, 2041214), (14, 1458010), (20, 1020607), (28, 729005), (35, 583204), (70, 291602), (140, 145801), (211, 96740), (422, 48370), (691, 29540), (844, 24185), (1055, 19348), (1382, 14770), (1477, 13820), (2110, 9674), (2764, 7385), (2954, 6910), (3455, 5908), (4220, 4837)]