20125520

素因数分解:

$2^4\times 5^1\times {\mathrm{197}}^1\times {\mathrm{1277}}^1$

素因数の和:1487

約数の個数: 40

約数和(自身を含む): 47066184

約数和(自身を除く): 26940664

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 197, 394, 788, 985, 1277, 1576, 1970, 2554, 3152, 3940, 5108, 6385, 7880, 10216, 12770, 15760, 20432, 25540, 51080, 102160, 251569, 503138, 1006276, 1257845, 2012552, 2515690, 4025104, 5031380, 10062760, 20125520]

約数ペア:

[(1, 20125520), (2, 10062760), (4, 5031380), (5, 4025104), (8, 2515690), (10, 2012552), (16, 1257845), (20, 1006276), (40, 503138), (80, 251569), (197, 102160), (394, 51080), (788, 25540), (985, 20432), (1277, 15760), (1576, 12770), (1970, 10216), (2554, 7880), (3152, 6385), (3940, 5108)]