20513080

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{1201}}^1$

素因数の和:1280

約数の個数: 64

約数和(自身を含む): 53657280

約数和(自身を除く): 33144200

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 61, 70, 122, 140, 244, 280, 305, 427, 488, 610, 854, 1201, 1220, 1708, 2135, 2402, 2440, 3416, 4270, 4804, 6005, 8407, 8540, 9608, 12010, 16814, 17080, 24020, 33628, 42035, 48040, 67256, 73261, 84070, 146522, 168140, 293044, 336280, 366305, 512827, 586088, 732610, 1025654, 1465220, 2051308, 2564135, 2930440, 4102616, 5128270, 10256540, 20513080]

約数ペア:

[(1, 20513080), (2, 10256540), (4, 5128270), (5, 4102616), (7, 2930440), (8, 2564135), (10, 2051308), (14, 1465220), (20, 1025654), (28, 732610), (35, 586088), (40, 512827), (56, 366305), (61, 336280), (70, 293044), (122, 168140), (140, 146522), (244, 84070), (280, 73261), (305, 67256), (427, 48040), (488, 42035), (610, 33628), (854, 24020), (1201, 17080), (1220, 16814), (1708, 12010), (2135, 9608), (2402, 8540), (2440, 8407), (3416, 6005), (4270, 4804)]