15901840

素因数分解:

$2^4\times 5^1\times {\mathrm{197}}^1\times {\mathrm{1009}}^1$

素因数の和:1219

約数の個数: 40

約数和(自身を含む): 37196280

約数和(自身を除く): 21294440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 197, 394, 788, 985, 1009, 1576, 1970, 2018, 3152, 3940, 4036, 5045, 7880, 8072, 10090, 15760, 16144, 20180, 40360, 80720, 198773, 397546, 795092, 993865, 1590184, 1987730, 3180368, 3975460, 7950920, 15901840]

約数ペア:

[(1, 15901840), (2, 7950920), (4, 3975460), (5, 3180368), (8, 1987730), (10, 1590184), (16, 993865), (20, 795092), (40, 397546), (80, 198773), (197, 80720), (394, 40360), (788, 20180), (985, 16144), (1009, 15760), (1576, 10090), (1970, 8072), (2018, 7880), (3152, 5045), (3940, 4036)]