20500880

素因数分解:

$2^4\times 5^1\times {\mathrm{61}}^1\times {\mathrm{4201}}^1$

素因数の和:4275

約数の個数: 40

約数和(自身を含む): 48457464

約数和(自身を除く): 27956584

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 61, 80, 122, 244, 305, 488, 610, 976, 1220, 2440, 4201, 4880, 8402, 16804, 21005, 33608, 42010, 67216, 84020, 168040, 256261, 336080, 512522, 1025044, 1281305, 2050088, 2562610, 4100176, 5125220, 10250440, 20500880]

約数ペア:

[(1, 20500880), (2, 10250440), (4, 5125220), (5, 4100176), (8, 2562610), (10, 2050088), (16, 1281305), (20, 1025044), (40, 512522), (61, 336080), (80, 256261), (122, 168040), (244, 84020), (305, 67216), (488, 42010), (610, 33608), (976, 21005), (1220, 16804), (2440, 8402), (4201, 4880)]