878895380

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{997}}^1\times {\mathrm{4007}}^1$

素因数の和:5024

約数の個数: 48

約数和(自身を含む): 2015991936

約数和(自身を除く): 1137096556

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 997, 1994, 3988, 4007, 4985, 8014, 9970, 10967, 16028, 19940, 20035, 21934, 40070, 43868, 44077, 54835, 80140, 88154, 109670, 176308, 219340, 220385, 440770, 881540, 3994979, 7989958, 15979916, 19974895, 39949790, 43944769, 79899580, 87889538, 175779076, 219723845, 439447690, 878895380]

約数ペア:

[(1, 878895380), (2, 439447690), (4, 219723845), (5, 175779076), (10, 87889538), (11, 79899580), (20, 43944769), (22, 39949790), (44, 19974895), (55, 15979916), (110, 7989958), (220, 3994979), (997, 881540), (1994, 440770), (3988, 220385), (4007, 219340), (4985, 176308), (8014, 109670), (9970, 88154), (10967, 80140), (16028, 54835), (19940, 44077), (20035, 43868), (21934, 40070)]