21380900

素因数分解:

$2^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{12577}}^1$

素因数の和:12608

約数の個数: 36

約数和(自身を含む): 49129668

約数和(自身を除く): 27748768

約数列:

[1, 2, 4, 5, 10, 17, 20, 25, 34, 50, 68, 85, 100, 170, 340, 425, 850, 1700, 12577, 25154, 50308, 62885, 125770, 213809, 251540, 314425, 427618, 628850, 855236, 1069045, 1257700, 2138090, 4276180, 5345225, 10690450, 21380900]

約数ペア:

[(1, 21380900), (2, 10690450), (4, 5345225), (5, 4276180), (10, 2138090), (17, 1257700), (20, 1069045), (25, 855236), (34, 628850), (50, 427618), (68, 314425), (85, 251540), (100, 213809), (170, 125770), (340, 62885), (425, 50308), (850, 25154), (1700, 12577)]