28137520

素因数分解:

$2^4\times 5^1\times {\mathrm{509}}^1\times {\mathrm{691}}^1$

素因数の和:1213

約数の個数: 40

約数和(自身を含む): 65643120

約数和(自身を除く): 37505600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 509, 691, 1018, 1382, 2036, 2545, 2764, 3455, 4072, 5090, 5528, 6910, 8144, 10180, 11056, 13820, 20360, 27640, 40720, 55280, 351719, 703438, 1406876, 1758595, 2813752, 3517190, 5627504, 7034380, 14068760, 28137520]

約数ペア:

[(1, 28137520), (2, 14068760), (4, 7034380), (5, 5627504), (8, 3517190), (10, 2813752), (16, 1758595), (20, 1406876), (40, 703438), (80, 351719), (509, 55280), (691, 40720), (1018, 27640), (1382, 20360), (2036, 13820), (2545, 11056), (2764, 10180), (3455, 8144), (4072, 6910), (5090, 5528)]