28201520

素因数分解:

$2^4\times 5^1\times {\mathrm{61}}^1\times {\mathrm{5779}}^1$

素因数の和:5853

約数の個数: 40

約数和(自身を含む): 66654960

約数和(自身を除く): 38453440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 61, 80, 122, 244, 305, 488, 610, 976, 1220, 2440, 4880, 5779, 11558, 23116, 28895, 46232, 57790, 92464, 115580, 231160, 352519, 462320, 705038, 1410076, 1762595, 2820152, 3525190, 5640304, 7050380, 14100760, 28201520]

約数ペア:

[(1, 28201520), (2, 14100760), (4, 7050380), (5, 5640304), (8, 3525190), (10, 2820152), (16, 1762595), (20, 1410076), (40, 705038), (61, 462320), (80, 352519), (122, 231160), (244, 115580), (305, 92464), (488, 57790), (610, 46232), (976, 28895), (1220, 23116), (2440, 11558), (4880, 5779)]