165780920

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{67943}}^1$

素因数の和:68015

約数の個数: 32

約数和(自身を含む): 379127520

約数和(自身を除く): 213346600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 67943, 135886, 271772, 339715, 543544, 679430, 1358860, 2717720, 4144523, 8289046, 16578092, 20722615, 33156184, 41445230, 82890460, 165780920]

約数ペア:

[(1, 165780920), (2, 82890460), (4, 41445230), (5, 33156184), (8, 20722615), (10, 16578092), (20, 8289046), (40, 4144523), (61, 2717720), (122, 1358860), (244, 679430), (305, 543544), (488, 339715), (610, 271772), (1220, 135886), (2440, 67943)]