20420360

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{8369}}^1$

素因数の和:8441

約数の個数: 32

約数和(自身を含む): 46704600

約数和(自身を除く): 26284240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 8369, 16738, 33476, 41845, 66952, 83690, 167380, 334760, 510509, 1021018, 2042036, 2552545, 4084072, 5105090, 10210180, 20420360]

約数ペア:

[(1, 20420360), (2, 10210180), (4, 5105090), (5, 4084072), (8, 2552545), (10, 2042036), (20, 1021018), (40, 510509), (61, 334760), (122, 167380), (244, 83690), (305, 66952), (488, 41845), (610, 33476), (1220, 16738), (2440, 8369)]